{"id":223693,"date":"2026-08-17T22:46:52","date_gmt":"2026-08-17T17:16:52","guid":{"rendered":"https:\/\/www.oliveboard.in\/blog\/?p=223693"},"modified":"2026-08-18T20:24:06","modified_gmt":"2026-08-18T14:54:06","slug":"pipe-and-cistern","status":"publish","type":"post","link":"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/","title":{"rendered":"Pipe and Cistern Concepts, Formulas &amp; Live Quiz, Download"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_77 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of content<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Download_Pipe_and_Cistern_Questions_PDF\" >Download Pipe and Cistern Questions PDF<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Practice_Pipe_and_Cistern_Questions_Live\" >Practice Pipe and Cistern Questions Live<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Sign_Up\" >Sign Up<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Login\" >Login<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Forgot_Password\" >Forgot Password<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#i\" >&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#What_is_Pipe_and_Cistern_in_Quantitative_Aptitude\" >What is Pipe and Cistern in Quantitative Aptitude?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Why_is_Pipe_and_Cistern_Important_in_Competitive_Exams\" >Why is Pipe and Cistern Important in Competitive Exams?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Terms_Used_in_Pipe_and_Cistern_Questions\" >Terms Used in Pipe and Cistern Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Concepts_of_Pipe_and_Cistern_Questions\" >Concepts of Pipe and Cistern Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#What_Are_the_Types_of_Pipe_and_Cistern_Questions_in_Quantitative_Aptitude\" >What Are the Types of Pipe and Cistern Questions in Quantitative Aptitude?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Pipe_and_Cistern_Formulas\" >Pipe and Cistern Formulas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#Pipe_and_Cistern_Tricks_for_SSC_CGL_and_Other_Exams\" >Pipe and Cistern Tricks for SSC CGL and Other Exams<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.oliveboard.in\/blog\/pipe-and-cistern\/#FAQs\" >FAQs<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Quantitative Aptitude is a key component of most competitive exams, and one of the most practical chapters is Pipe and Cistern. This topic is a variation of Time and Work, focused on fluid-based problems like filling or emptying tanks using inlets and outlets. In this blog, we have provided all the details about Pipe and Cistern concepts, types of questions asked, time-saving tricks, strategies, and more.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-download-pipe-and-cistern-questions-pdf\"><span class=\"ez-toc-section\" id=\"Download_Pipe_and_Cistern_Questions_PDF\"><\/span>Download Pipe and Cistern Questions PDF<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Pipes and Cisterns<\/strong> is an important topic in the Quantitative Aptitude section of various competitive exams, including <a href=\"https:\/\/www.oliveboard.in\/ssc-exams\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">SSC<\/a>,\u00a0<a href=\"https:\/\/www.oliveboard.in\/railway-exams\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">Railways<\/a>, <a href=\"https:\/\/www.oliveboard.in\/banking-insurance-exams\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">Banking<\/a>, and other government exams. Practicing frequently asked Pipes and Cistern questions can help candidates improve their calculation speed, understand common question patterns, and increase accuracy in the exam. Below is a set of Pipes and Cistern practice questions, Candidates can practice these questions and download the PDF for preparation.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/pipe-and-cistern-questions-pdf\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Download Free PDF Here<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-practice-pipe-and-cistern-questions-live\"><span class=\"ez-toc-section\" id=\"Practice_Pipe_and_Cistern_Questions_Live\"><\/span>Practice Pipe and Cistern Questions Live<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Pipes and Cistern questions are frequently asked in SSC and other competitive examinations. Most questions are based on concepts such as inlet pipes, outlet pipes, filling and emptying tanks, combined efficiency, leakages, and pipes working together. Below is a collection of Pipes and Cistern questions for live practice.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"UTF-8\">\n<link rel=\"stylesheet\" href=\"https:\/\/courses.oliveboard.in\/edge\/css\/login-modal-for-blog.css\">\n\n<style>\n#quiz-1-sticky-header {\n  position: sticky;\n  top: 0;\n  z-index: 100;\n  background: #1565c0;\n  color: #fff;\n  padding: 12px 20px;\n  border-radius: 10px 10px 0 0;\n  display: flex;\n  justify-content: space-between;\n  align-items: center;\n  font-size: 16px;\n  font-weight: bold;\n  box-shadow: 0 2px 8px rgba(0,0,0,0.2);\n  margin: -20px -20px 20px -20px;\n}\n\n#quiz-1-score-badge {\n  background: rgba(255,255,255,0.2);\n  padding: 4px 12px;\n  border-radius: 20px;\n  font-size: 15px;\n  white-space: nowrap;\n}\n#quiz-1 * { box-sizing: border-box; }\n\n#quiz-1 .quiz-container {\n  max-width: 700px;\n  margin: auto;\n  padding: 20px;\n  background: #fff;\n  border-radius: 14px;\n  box-shadow: 0 6px 16px rgba(0,0,0,0.12);\n}\n\n#quiz-1 h2 {\n  text-align: center;\n}\n\n#quiz-1 .question {\n  margin-bottom: 22px;\n}\n\n#quiz-1 .question p {\n  font-weight: bold;\n}\n\n#quiz-1 button {\n  width: 100%;\n  padding: 12px;\n  margin: 6px 0;\n  border: none;\n  border-radius: 6px;\n  background: #e0e0e0;\n  color: #000;\n  font-size: 16px;\n  cursor: pointer;\n}\n\n#quiz-1 button:hover {\n  background: #d5d5d5;\n}\n\n#quiz-1 button.correct {\n  background: #4caf50;\n  color: #000;\n}\n\n#quiz-1 button.wrong {\n  background: #f44336;\n  color: #000;\n}\n\n#quiz-1 button.locked {\n  pointer-events: none;\n}\n\n\/* SUMMARY *\/\n#quiz-1 .final-summary {\n  margin-top: 40px;\n  padding: 20px;\n  border-radius: 14px;\n  background: #fafafa;\n  border: 2px solid #4caf50;\n}\n\n#quiz-1 .final-summary h3 {\n  text-align: center;\n  margin-bottom: 20px;\n}\n\n#quiz-1 .summary-row {\n  display: grid;\n  grid-template-columns: 120px 1fr 40px;\n  gap: 10px;\n  align-items: center;\n  margin-bottom: 12px;\n  font-weight: bold;\n}\n\n#quiz-1 .summary-bar {\n  height: 14px;\n  background: #ddd;\n  border-radius: 10px;\n  overflow: hidden;\n}\n\n#quiz-1 .bar-fill {\n  height: 100%;\n  width: 0%;\n}\n\n#quiz-1 .bar-attempted { background: #2196f3; }\n#quiz-1 .bar-correct { background: #4caf50; }\n#quiz-1 .bar-wrong { background: #f44336; }\n#quiz-1 .bar-unattempted { background: #9e9e9e; width: 100%; }\n\n#quiz-1 .final-score {\n  text-align: center;\n  font-size: 22px;\n  margin-top: 20px;\n}\n\n#quiz-1 .score-value {\n  font-size: 30px;\n  margin-left: 8px;\n}\n<\/style>\n<\/head>\n\n<body>\n<div id=\"quiz-1\">\n  <div class=\"quiz-container\">\n<div id=\"quiz-1-sticky-header\">\n  <span> Practice Pipes and Cistern Questions Live <\/span>\n  <span id=\"quiz-1-score-badge\">Score: <strong id=\"quiz-1-score-value\">0.00<\/strong><\/span>\n<\/div>\n\n    <!-- QUESTIONS -->\n\n<div class=\"question\" data-answered=\"false\">\n  <p>1. Pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"true\">12 minutes<\/button>\n  <button data-correct=\"false\">11 1\/2 minutes<\/button>\n  <button data-correct=\"false\">13 minutes<\/button>\n  <button data-correct=\"false\">12 1\/2 minutes<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>2. Pipes A and B can fill a tank in 15 minutes and 25 minutes respectively. If both are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">9 7\/8 minutes<\/button>\n  <button data-correct=\"false\">10 3\/8 minutes<\/button>\n  <button data-correct=\"true\">9 3\/8 minutes<\/button>\n  <button data-correct=\"false\">8 7\/8 minutes<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>3. Pipes A, B and C can fill a tank in 15 minutes, 20 minutes and 30 minutes respectively. If all three are opened together, how long will they take to fill the tank?<\/p>\n  <button data-correct=\"false\">7 2\/3 minutes<\/button>\n  <button data-correct=\"false\">7 1\/6 minutes<\/button>\n  <button data-correct=\"false\">6 1\/6 minutes<\/button>\n  <button data-correct=\"true\">6 2\/3 minutes<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>4. Pipes A, B and C can fill a tank in 12 minutes, 18 minutes and 36 minutes respectively. If all three are opened together, how long will they take to fill the tank?<\/p>\n  <button data-correct=\"false\">5 1\/2 minutes<\/button>\n  <button data-correct=\"false\">7 minutes<\/button>\n  <button data-correct=\"false\">6 1\/2 minutes<\/button>\n  <button data-correct=\"true\">6 minutes<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>5. Pipes A and B can fill a tank in 25 minutes and 30 minutes respectively. If both are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">14 3\/22 minutes<\/button>\n  <button data-correct=\"true\">13 7\/11 minutes<\/button>\n  <button data-correct=\"false\">13 3\/22 minutes<\/button>\n  <button data-correct=\"false\">14 7\/11 minutes<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>6. Pipes A and B can fill a tank in 6 hours and 8 hours respectively. If both are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">2 4\/7 hours<\/button>\n  <button data-correct=\"true\">3 3\/7 hours<\/button>\n  <button data-correct=\"false\">3 13\/14 hours<\/button>\n  <button data-correct=\"false\">2 13\/14 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>7. Pipes A and B can fill a tank in 10 hours and 15 hours respectively. If both are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"true\">6 hours<\/button>\n  <button data-correct=\"false\">7 hours<\/button>\n  <button data-correct=\"false\">5 1\/2 hours<\/button>\n  <button data-correct=\"false\">6 1\/2 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>8. Pipes A, B and C can fill a tank in 12 hours, 20 hours and 30 hours respectively. If all three are opened together, how long will they take to fill the tank?<\/p>\n  <button data-correct=\"false\">7 hours<\/button>\n  <button data-correct=\"true\">6 hours<\/button>\n  <button data-correct=\"false\">5 1\/2 hours<\/button>\n  <button data-correct=\"false\">6 1\/2 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>9. Pipes A and B can fill a tank in 14 hours and 21 hours respectively. If both are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">7 2\/5 hours<\/button>\n  <button data-correct=\"true\">8 2\/5 hours<\/button>\n  <button data-correct=\"false\">8 9\/10 hours<\/button>\n  <button data-correct=\"false\">7 9\/10 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>10. Pipes A, B and C can fill a tank in 16 hours, 24 hours and 48 hours respectively. If all three are opened together, how long will they take to fill the tank?<\/p>\n  <button data-correct=\"true\">8 hours<\/button>\n  <button data-correct=\"false\">8 1\/2 hours<\/button>\n  <button data-correct=\"false\">9 hours<\/button>\n  <button data-correct=\"false\">7 1\/2 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>11. Pipes A and B can fill a tank in 10 hours and 15 hours respectively, while pipe C can empty it in 30 hours. If all three are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">7 hours<\/button>\n  <button data-correct=\"false\">8 1\/2 hours<\/button>\n  <button data-correct=\"true\">7 1\/2 hours<\/button>\n  <button data-correct=\"false\">8 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>12. Pipes A and B can fill a tank in 12 hours and 18 hours respectively, while pipe C can empty it in 36 hours. If all three are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">9 1\/2 hours<\/button>\n  <button data-correct=\"true\">9 hours<\/button>\n  <button data-correct=\"false\">8 1\/2 hours<\/button>\n  <button data-correct=\"false\">10 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>13. Pipes A and B can fill a tank in 8 hours and 12 hours respectively, while pipe C can empty it in 24 hours. If all three are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">5 hours<\/button>\n  <button data-correct=\"true\">6 hours<\/button>\n  <button data-correct=\"false\">6 1\/2 hours<\/button>\n  <button data-correct=\"false\">5 1\/2 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>14. Pipes A and B can fill a tank in 6 hours and 8 hours respectively, while pipe C can empty it in 24 hours. If all three are opened together, in how much time will the tank be filled?<\/p>\n  <button data-correct=\"false\">3 1\/2 hours<\/button>\n  <button data-correct=\"false\">4 1\/2 hours<\/button>\n  <button data-correct=\"false\">3 1\/5 hours<\/button>\n  <button data-correct=\"true\">4 hours<\/button>\n<\/div>\n\n<div class=\"question\" data-answered=\"false\">\n  <p>15. An inlet pipe can fill a tank in 20 minutes, while an outlet pipe can empty the full tank in 30 minutes. If both are opened together when the tank is empty, in how much time will it be filled?<\/p>\n  <button data-correct=\"false\">59 minutes<\/button>\n  <button data-correct=\"true\">60 minutes<\/button>\n  <button data-correct=\"false\">60 1\/2 minutes<\/button>\n  <button data-correct=\"false\">59 1\/2 minutes<\/button>\n<\/div>\n\n    <!-- FINAL SUMMARY -->\n    <div class=\"final-summary\">\n      <h3>Quiz Summary <\/h3>\n\n      <div class=\"summary-row\">\n        <span>Attempted<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-attempted\" data-summary=\"attempted\"><\/div><\/div>\n        <span data-count=\"attempted\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Correct<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-correct\" data-summary=\"correct\"><\/div><\/div>\n        <span data-count=\"correct\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Wrong<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-wrong\" data-summary=\"wrong\"><\/div><\/div>\n        <span data-count=\"wrong\">0<\/span>\n      <\/div>\n\n      <div class=\"summary-row\">\n        <span>Unattempted<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-unattempted\" data-summary=\"unattempted\"><\/div><\/div>\n        <span data-count=\"unattempted\">0<\/span>\n      <\/div>\n\n      <div class=\"final-score\">\n        Final Score: <span class=\"score-value\" data-score>0.0<\/span>\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/div>\n<div class=\"modal modal-obls\" id=\"modal-signup\">\n        <div class=\"modal-background\"><\/div>\n        <div class=\"modal-content\">\n           <div class=\"obls-group\" id=\"obls-group1\">\n               <div class=\"obls-blk\">\n                   <span class=\"img-box\"><img decoding=\"async\" src=\"\/img\/img-delivery.svg\" alt=\"\"><\/span>\n                   <h2 id=\"display-register-text\"><span 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Pipes can fill (inlets) or empty (outlets) a tank, and the problem revolves around how long it takes to fill or empty the cistern. This topic checks:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Basic time-work concept<\/li>\n\n\n\n<li>Logical application of speed-flow analogy<\/li>\n\n\n\n<li>Efficiency understanding of combined work (inlets vs outlets)<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/ssc-cgl-maths-topic-wise-questions-pdf\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">Attempt SSC CGL Topic Wise Maths Questions<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-is-pipe-and-cistern-important-in-competitive-exams\"><span class=\"ez-toc-section\" id=\"Why_is_Pipe_and_Cistern_Important_in_Competitive_Exams\"><\/span>Why is Pipe and Cistern Important in Competitive Exams?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Pipe and Cistern is one of the easier chapters that, if prepared well, can help you score full marks in the exam from this topic<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Exam<\/strong><\/td><td><strong>No. of Questions<\/strong><\/td><td><strong>Difficulty<\/strong><\/td><\/tr><tr><td><a href=\"https:\/\/www.oliveboard.in\/ssc-cgl\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL<\/a>\u00a0\/\u00a0<a href=\"https:\/\/www.oliveboard.in\/ssc-chsl\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CHSL<\/a><\/td><td>1-2<\/td><td>Easy<\/td><\/tr><tr><td><a href=\"https:\/\/www.oliveboard.in\/ibps-po\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">IBPS PO<\/a>\u00a0\/\u00a0<a href=\"https:\/\/www.oliveboard.in\/sbi-po\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">SBI PO<\/a><\/td><td>1-2<\/td><td>Moderate<\/td><\/tr><tr><td><a href=\"https:\/\/www.oliveboard.in\/railway-rrb-ntpc\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">RRB NTPC<\/a>\u00a0\/\u00a0<a href=\"https:\/\/www.oliveboard.in\/railways-rrb-group-d\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D<\/a><\/td><td>1<\/td><td>Easy<\/td><\/tr><tr><td>State PSC \/ Police<\/td><td>1-2<\/td><td>Moderate<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/ibps-po-mock-test\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">Attempt A Free IBPS PO Mock Test<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-terms-used-in-pipe-and-cistern-questions\"><span class=\"ez-toc-section\" id=\"Terms_Used_in_Pipe_and_Cistern_Questions\"><\/span>Terms Used in Pipe and Cistern Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Terms commonly used in pipe and cistern types of questions are as follows:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Term<\/strong><\/td><td><strong>Details<\/strong><\/td><\/tr><tr><td>Inlet Pipe<\/td><td>A pipe that <strong>fills<\/strong> the tank<\/td><\/tr><tr><td>Outlet Pipe<\/td><td>A pipe that <strong>empties<\/strong> the tank<\/td><\/tr><tr><td>Net Work<\/td><td>Total work done when both inlet and outlet operate together<\/td><\/tr><tr><td>Efficiency (Rate)<\/td><td>Part of the tank filled\/emptied in 1 hour or 1 minute<\/td><\/tr><tr><td>LCM Method<\/td><td>Used to avoid fractional calculations (consider tank as 60L, 120L)<\/td><\/tr><tr><td>Negative Work<\/td><td>Outlet pipe\u2019s work is taken as negative in combined equations<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-concepts-of-pipe-and-cistern-questions\"><span class=\"ez-toc-section\" id=\"Concepts_of_Pipe_and_Cistern_Questions\"><\/span>Concepts of Pipe and Cistern Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Some of the common concepts used while solving pipe and cistern questions are as follows:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Concept<\/strong><\/td><td><strong>Explanation<\/strong><\/td><\/tr><tr><td>Inlet fills in &#8216;x&#8217; hr<\/td><td>1\/x part of tank is filled per hour<\/td><\/tr><tr><td>Outlet empties in &#8216;y&#8217; hr<\/td><td>1\/y part is emptied per hour (taken as -1\/y in equations)<\/td><\/tr><tr><td>Net Rate Formula<\/td><td>Net rate = (Inlet rate \u2013 Outlet rate)<\/td><\/tr><tr><td>Time to Fill\/Empty<\/td><td>Time = Work \u00f7 Net Rate<\/td><\/tr><tr><td>If both pipes open together<\/td><td>Total time = 1 \/ (1\/x \u2013 1\/y) or 1 \/ (1\/x + 1\/y), depending on in\/outlet<\/td><\/tr><tr><td>Partial Fill Problem<\/td><td>Use ratio method or unitary method for \u201chalf-filled\u201d scenarios<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-are-the-types-of-pipe-and-cistern-questions-in-quantitative-aptitude\"><span class=\"ez-toc-section\" id=\"What_Are_the_Types_of_Pipe_and_Cistern_Questions_in_Quantitative_Aptitude\"><\/span>What Are the Types of Pipe and Cistern Questions in Quantitative Aptitude?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Types of questions commonly asked from the topic are as follows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Direct Questions<\/strong>: One inlet or outlet with simple time calculation<\/li>\n\n\n\n<li><strong>Combined Pipes<\/strong>: Both pipes operate together (positive and negative work)<\/li>\n\n\n\n<li><strong>Leakage-based<\/strong>: Leakage reduces flow; subtract leakage rate from inlet<\/li>\n\n\n\n<li><strong>Variable Pipes<\/strong>: Pipes open\/close after certain time<\/li>\n\n\n\n<li><strong>Cyclic Pattern<\/strong>: Pipes open in fixed order repeatedly<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/sbi-po-mock-test\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">Attempt A Free SBI PO Mock Test<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pipe-and-cistern-formulas\"><span class=\"ez-toc-section\" id=\"Pipe_and_Cistern_Formulas\"><\/span>Pipe and Cistern Formulas <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Here are the time-saving formulas and logical templates:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>If a pipe fills a tank in x hours<\/strong>, its rate = 1\/x<\/li>\n\n\n\n<li><strong>If a pipe empties a tank in y hours<\/strong>, its rate = \u20131\/y<\/li>\n\n\n\n<li><strong>If both pipes work together<\/strong>, net rate = (1\/x \u2013 1\/y) or (1\/x + 1\/y)<\/li>\n\n\n\n<li><strong>If the tank is partially filled\/emptied<\/strong>, apply the formula: Time=VolumeNet\u00a0Rate\\text{Time} = \\frac{\\text{Volume}}{\\text{Net Rate}}Time=Net\u00a0RateVolume\u200b<\/li>\n\n\n\n<li><strong>LCM shortcut<\/strong>: Assume tank volume = LCM of individual times to simplify<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pipe-and-cistern-tricks-for-ssc-cgl-and-other-exams\"><span class=\"ez-toc-section\" id=\"Pipe_and_Cistern_Tricks_for_SSC_CGL_and_Other_Exams\"><\/span>Pipe and Cistern Tricks for SSC CGL and Other Exams<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Some of the quick time saving tricks are as follows:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Assume Tank Capacity as LCM<\/strong> of all time values (e.g., 60L, 120L)<\/li>\n\n\n\n<li><strong>Treat outlet as negative work<\/strong> when working with both inlet and outlet<\/li>\n\n\n\n<li><strong>Skip unit conversion<\/strong> unless time is in minutes and rate is per hour<\/li>\n\n\n\n<li><strong>Use ratio method<\/strong> for partial fill questions<\/li>\n\n\n\n<li><strong>Cross-check units<\/strong> (minutes\/hour) before applying formulas<\/li>\n\n\n\n<li><strong>Reverse solve from options<\/strong> if stuck with calculations<\/li>\n\n\n\n<li><\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/ssc-cgl-mock-test\/?ref=contmk-blog-pipecistern\" target=\"_blank\" rel=\"noreferrer noopener\">Attempt A Free SSC CGL Mock Test<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1754465104046\"><strong class=\"schema-faq-question\">Q1. What is the basic concept of Pipe and Cistern problems?<\/strong> <p class=\"schema-faq-answer\">They are based on time and work, involving pipes filling or emptying a tank.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754465105123\"><strong class=\"schema-faq-question\">Q2. How do you calculate the rate of a pipe?<\/strong> <p class=\"schema-faq-answer\">Divide 1 by the time it takes to fill or empty the tank.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754465105651\"><strong class=\"schema-faq-question\">Q3. How do you handle an outlet pipe in problems?<\/strong> <p class=\"schema-faq-answer\">Treat outlet work as negative when calculating combined rate.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754465106523\"><strong class=\"schema-faq-question\">Q4. What formula is used when both pipes work together?<\/strong> <p class=\"schema-faq-answer\">Net rate = 1\/x \u00b1 1\/y, depending on inlet or outlet involvement.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754465107087\"><strong class=\"schema-faq-question\">Q5. What is a leakage-based Pipe and Cistern problem?<\/strong> <p class=\"schema-faq-answer\">It involves subtracting the leak\u2019s rate from the inlet pipe\u2019s rate.<\/p> <\/div> <\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ibps-rrb-state-wise-vacancies\/\">IBPS RRB Vacancy 2026: 13,757 Post-Wise &amp; State-Wise Data<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ibps-so-marketing-officer-consumer-behaviour\/\">IBPS SO Marketing Officer Consumer Behaviour 2026, FREE Quiz &amp; PDF<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ibps-so-marketing-officer-product-life-cycle\/\">IBPS SO Marketing Officer Product Life Cycle 2026, FREE PDF &amp; Quiz<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ibps-so-marketing-officer-sales-management\/\">IBPS SO Marketing Officer Sales Management 2026, FREE PDF &amp; Quiz<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ibps-so-marketing-officer-advertising\/\">IBPS SO Marketing Officer Advertising Quiz 2026, FREE PDF &amp; Quiz<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/how-t-agilan-cracks-sbi-cbo-in-his-1st-attempt-with-2-hours-of-daily-study\/\">How T Agilan Cracks SBI CBO in His 1st Attempt with 2 Hours of Daily Study<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Quantitative Aptitude is a key component of most competitive exams, and one of the most practical chapters is Pipe and<\/p>\n","protected":false},"author":54,"featured_media":249975,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,5217,10231],"tags":[],"class_list":["post-223693","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bank-exams","category-ssc-prep","category-ssc-railways","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pipe and Cistern Concepts, Formulas &amp; Live Quiz, Download PDF<\/title>\n<meta name=\"description\" content=\"Pipe and Cistern Concepts, Formulas &amp; Live Quiz with easy tricks and practice questions for SSC, Bank, Railway &amp; other exams. 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