{"id":223701,"date":"2025-10-30T21:57:44","date_gmt":"2025-10-30T16:27:44","guid":{"rendered":"https:\/\/www.oliveboard.in\/blog\/?p=223701"},"modified":"2025-10-30T21:58:53","modified_gmt":"2025-10-30T16:28:53","slug":"time-and-work-questions","status":"publish","type":"post","link":"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/","title":{"rendered":"Time and Work Formula, Concepts, Tricks and Tips"},"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\/time-and-work-questions\/#Solved_Time_and_Work_Questions_from_Previous_Year_Exams\" >Solved Time and Work Questions from Previous Year Exams<\/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\/time-and-work-questions\/#Time_and_Work_Concepts_for_Bank_Exams\" >Time and Work Concepts for Bank Exams<\/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\/time-and-work-questions\/#What_is_Time_and_Work_in_Quantitative_Aptitude\" >What is Time and Work in Quantitative Aptitude?<\/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\/time-and-work-questions\/#Why_is_Time_and_Work_Important_in_Competitive_Exams\" >Why is Time and Work 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-5\" href=\"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/#Time_and_Work_Quantitative_Aptitude_Short_Notes\" >Time and Work Quantitative Aptitude Short Notes<\/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\/time-and-work-questions\/#Concepts_Used_in_Time_and_Work_Questions\" >Concepts Used in Time and Work Questions<\/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\/time-and-work-questions\/#What_are_the_Types_of_Time_and_Work_Questions_in_Quantitative_Aptitude\" >What are the Types of Time and Work 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-8\" href=\"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/#Time_and_Work_Formulas_for_Quantitative_Aptitude\" >Time and Work Formulas for Quantitative Aptitude<\/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\/time-and-work-questions\/#Time_and_Work_Tricks_for_SSC_CGL_and_Other_Exams\" >Time and Work 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-10\" href=\"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/#Common_Mistakes_to_Avoid_while_Solving_Time_and_Work\" >Common Mistakes to Avoid while Solving Time and Work<\/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\/time-and-work-questions\/#FAQs\" >FAQs<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><strong>Time and Work<\/strong> is one of the most common and important topics in the Quantitative Aptitude section of exams like <strong>SSC, Banking, and Railways<\/strong>. Questions from this topic often test your ability to calculate how quickly a task can be completed by one or more people, and how efficiently they can work together. In this blog, we will give you 20 previous year solved questions to help you score better in your exams on Time and Work including basic concepts, important formulas, short tricks, and previous year solved questions to help you score better in your exams.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-solved-time-and-work-questions-from-previous-year-exams\"><span class=\"ez-toc-section\" id=\"Solved_Time_and_Work_Questions_from_Previous_Year_Exams\"><\/span>Solved Time and Work Questions from Previous Year Exams<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Here are some Time and Work questions that have been asked in previous year exams such as <a href=\"https:\/\/www.oliveboard.in\/ssc-cgl\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL<\/a>, <a href=\"https:\/\/www.oliveboard.in\/ssc-chsl\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CHSL<\/a>, <a href=\"https:\/\/www.oliveboard.in\/ssc-mts\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC MTS<\/a>, <a href=\"https:\/\/www.oliveboard.in\/ssc-gd-constable\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC GD Constable<\/a>, <a href=\"https:\/\/www.oliveboard.in\/railway-rrb-ntpc\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Railway RRB NTPC<\/a>, <a href=\"https:\/\/www.oliveboard.in\/ibps-clerk\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">IBPS Clerk<\/a>, <a href=\"https:\/\/www.oliveboard.in\/ibps-po\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">IBPS PO<\/a>, and <a href=\"https:\/\/www.oliveboard.in\/sbi-clerk\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SBI Clerk<\/a> and <a href=\"https:\/\/www.oliveboard.in\/sbi-po\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SBI PO<\/a> exams. Solving these questions will help you understand the exam pattern, the level of difficulty, and the types of problems commonly asked in competitive exams.<\/p>\n\n\n\n<p><strong>Q1.<\/strong> A can do a piece of work in 10 days, B in 15 days. They work together for 3 days. How much work is left?<br><strong>Ans:<\/strong> 710\\frac{7}{10}107\u200b work left<br><strong>Explanation:<\/strong><br>A\u2019s 1-day work = 1\/10, B\u2019s = 1\/15<br>Together = 1\/6<br>Work done in 3 days = 3 \u00d7 1\/6 = 1\/2<br>Remaining = 1 \u2013 1\/2 = <strong>1\/2<\/strong><\/p>\n\n\n\n<p><strong>Q2.<\/strong> A and B together can do a work in 12 days. A alone can do it in 20 days. In how many days can B alone do it?<br><strong>Ans:<\/strong> 30 days<br><strong>Explanation:<\/strong><br>A + B = 1\/12<br>A = 1\/20<br>B = 1\/12 \u2013 1\/20 = 1\/30<\/p>\n\n\n\n<p><strong>Q3<\/strong>. A does 60% of work in 12 days. How many more days to complete full work?<br><strong>Ans:<\/strong> 8 days<br><strong>Explanation:<\/strong><br>60% = 12 days \u21d2 100% = (12\/60) \u00d7 100 = 20 days<br>Remaining = 20 \u2013 12 = 8 days<\/p>\n\n\n\n<p><strong>Q4.<\/strong> A can do a piece of work in 8 days, B can do the same in 12 days. They work together for 4 days. What fraction of work is left?<br><strong>Ans:<\/strong> 13\\frac{1}{3}31\u200b work left<br><strong>Explanation:<\/strong><br>A\u2019s 1-day work = 1\/8, B\u2019s = 1\/12<br>Together = (3 + 2)\/24 = 5\/24<br>Work in 4 days = 4 \u00d7 5\/24 = 5\/6<br>Remaining = 1 \u2013 5\/6 = <strong>1\/6<\/strong><\/p>\n\n\n\n<p><strong>Q5.<\/strong> A can do a work in 15 days and B can do it in 20 days. With help of C, they finish it in 5 days. How long will C alone take?<br><strong>Ans:<\/strong> 60 days<br><strong>Explanation:<\/strong><br>A + B + C = 1\/5<br>A = 1\/15, B = 1\/20<br>C = 1\/5 \u2013 (1\/15 + 1\/20) = 1\/60<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Q6.<\/strong> A can do a job in 6 days. B is 50% more efficient than A. How many days will B take?<br><strong>Ans:<\/strong> 4 days<br><strong>Explanation:<\/strong><br>If A takes 6 days, B\u2019s efficiency = 150% of A<br>Hence, B will take = 6 \u00d7 (100\/150) = <strong>4 days<\/strong><\/p>\n\n\n\n<p><strong>Q7.<\/strong> A and B can do a piece of work in 10 days, B and C in 12 days, and A and C in 15 days. How long will A, B, and C together take?<br><strong>Ans:<\/strong> 8 days<br><strong>Explanation:<\/strong><br>(A + B) = 1\/10, (B + C) = 1\/12, (A + C) = 1\/15<br>Adding all: 2(A + B + C) = 1\/10 + 1\/12 + 1\/15 = (6 + 5 + 4)\/60 = 15\/60<br>A + B + C = 15\/120 = <strong>1\/8<\/strong><\/p>\n\n\n\n<p><strong>Q8.<\/strong> A can do a piece of work in 5 days, B in 10 days. They start together, but B leaves after 2 days. How long will A take to finish the remaining work?<br><strong>Ans:<\/strong> 2 more days<br><strong>Explanation:<\/strong><br>A + B in 1 day = 1\/5 + 1\/10 = 3\/10<br>Work in 2 days = 6\/10 = 3\/5<br>Remaining = 2\/5<br>A alone = (2\/5) \u00f7 (1\/5) = <strong>2 days<\/strong><\/p>\n\n\n\n<p><strong>Q9.<\/strong> A and B can do a work in 18 days and 24 days respectively. They start together, but A leaves after 6 days. How long will B take to finish the rest?<br><strong>Ans:<\/strong> 10 days<br><strong>Explanation:<\/strong><br>A\u2019s 1-day work = 1\/18, B\u2019s = 1\/24<br>In 6 days, done = 6 \u00d7 (1\/18 + 1\/24) = 6 \u00d7 (7\/72) = 7\/12<br>Remaining = 5\/12<br>B alone = (5\/12) \u00f7 (1\/24) = <strong>10 days<\/strong><\/p>\n\n\n\n<p><strong>Q10.<\/strong> A is twice as efficient as B. Together they finish a task in 12 days. How long will B take alone?<br><strong>Ans:<\/strong> 36 days<br><strong>Explanation:<\/strong><br>Let B = 1x, A = 2x \u21d2 total = 3x<br>3x \u00d7 12 = 1 \u21d2 x = 1\/36<br>So, B alone = <strong>36 days<\/strong><\/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\/blog\/time-work-short-tricks\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Know Time And Work Short tricks<\/a><\/div>\n<\/div>\n\n\n\n<p><strong>Q11.<\/strong> A can complete a task in 9 days and B in 18 days. They work alternately starting with A. How many days to finish the work?<br><strong>Ans:<\/strong> 12 days<br><strong>Explanation:<\/strong><br>A\u2019s 1-day work = 1\/9, B\u2019s = 1\/18<br>In 2 days = 1\/9 + 1\/18 = 1\/6<br>After 10 days = 5 \u00d7 1\/6 = 5\/6<br>Remaining = 1\/6 (done by A on day 11)<br>Total = <strong>11 days<\/strong><\/p>\n\n\n\n<p><strong>Q12.<\/strong> 10 men can complete a work in 15 days. How many men are needed to finish it in 5 days?<br><strong>Ans:<\/strong> 30 men<br><strong>Explanation:<\/strong><br>Men \u00d7 Days = constant<br>10 \u00d7 15 = M \u00d7 5 \u21d2 M = 30<\/p>\n\n\n\n<p><strong>Q13.<\/strong> A can do a work in 10 days. He works alone for 4 days, then B joins and together they finish in 2 more days. How long would B alone take?<br><strong>Ans:<\/strong> 5 days<br><strong>Explanation:<\/strong><br>A\u2019s 1-day = 1\/10<br>A\u2019s 4-day work = 4\/10 = 2\/5<br>Remaining = 3\/5 done by (A + B) in 2 days<br>A + B = (3\/5)\/2 = 3\/10 \u21d2 B = 3\/10 \u2013 1\/10 = 1\/5 \u21d2 <strong>5 days<\/strong><\/p>\n\n\n\n<p><strong>Q14.<\/strong> A and B can do a work in 15 days, and B alone can do it in 25 days. In how many days can A do it alone?<br><strong>Ans:<\/strong> 37.5 days<br><strong>Explanation:<\/strong><br>A + B = 1\/15, B = 1\/25<br>A = 1\/15 \u2013 1\/25 = (5 \u2013 3)\/75 = 2\/75 \u21d2 <strong>37.5 days<\/strong><\/p>\n\n\n\n<p><strong>Q15.<\/strong> A can complete a piece of work in 40 days, and B can do the same in 50 days. They work together for 10 days, then C completes the remaining work in 10 days. How long will C take alone?<br><strong>Ans:<\/strong> 100 days<br><strong>Explanation:<\/strong><br>A + B = (1\/40 + 1\/50) = 9\/200<br>Work in 10 days = 9\/20<br>Remaining = 11\/20<br>C = (11\/20)\/10 = 11\/200 \u21d2 <strong>100 days<\/strong><\/p>\n\n\n\n<p><strong>Q16.<\/strong> 8 men can finish a job in 12 days. After working 6 days, 4 men leave. How many more days will the remaining men take?<br><strong>Ans:<\/strong> 12 days<br><strong>Explanation:<\/strong><br>8 \u00d7 12 = 96 man-days<br>Work done in 6 days = 8 \u00d7 6 = 48<br>Remaining = 48 man-days<br>Now 4 men left \u21d2 4 men remain<br>Days = 48\/4 = <strong>12 days<\/strong><\/p>\n\n\n\n<p><strong>Q17.<\/strong> A can do a work in 18 days, B in 27 days. If they work together and earn \u20b91350, how much should A get?<br><strong>Ans:<\/strong> \u20b9810<br><strong>Explanation:<\/strong><br>A\u2019s efficiency = 1\/18, B\u2019s = 1\/27<br>Ratio = 3 : 2<br>A\u2019s share = (3\/5) \u00d7 1350 = <strong>\u20b9810<\/strong><\/p>\n\n\n\n<p><strong>Q18.<\/strong> A can do a job in 15 days, B in 20 days, and C in 30 days. They work together for 2 days, then A leaves. In how many more days will B and C finish the rest?<br><strong>Ans:<\/strong> 8 days<br><strong>Explanation:<\/strong><br>A + B + C = (1\/15 + 1\/20 + 1\/30) = 1\/6<br>Work in 2 days = 1\/3<br>Remaining = 2\/3<br>B + C = 1\/20 + 1\/30 = 1\/12<br>Required = (2\/3) \u00f7 (1\/12) = <strong>8 days<\/strong><\/p>\n\n\n\n<p><strong>Q19.<\/strong> A and B together can do a work in 8 days. A is twice as efficient as B. In how many days can A alone complete it?<br><strong>Ans:<\/strong> 12 days<br><strong>Explanation:<\/strong><br>A = 2x, B = x \u21d2 A + B = 3x = 1\/8 \u21d2 x = 1\/24 \u21d2 A = 2\/24 = 1\/12 \u21d2 <strong>12 days<\/strong><\/p>\n\n\n\n<p><strong>Q20.<\/strong> A, B, and C can do a work in 20, 30, and 60 days respectively. How long will they take together?<br><strong>Ans:<\/strong> 10 days<br><strong>Explanation:<\/strong><br>1\/20 + 1\/30 + 1\/60 = (3 + 2 + 1)\/60 = 6\/60 = 1\/10 \u21d2 <strong>10 days<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-time-and-work-concepts-for-bank-exams\"><span class=\"ez-toc-section\" id=\"Time_and_Work_Concepts_for_Bank_Exams\"><\/span>Time and Work Concepts for Bank Exams<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Bank exams often frame <strong>logic-based<\/strong> or <strong>symbolic questions<\/strong> around Time and Work. These may involve indirect relations or require candidates to use mental calculation speed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-example\">Example:<\/h3>\n\n\n\n<p>A can finish work in 16 days, B is 33.33% more efficient than A.<br>How many days will B take?<br><strong>Ans:<\/strong> 12 days<br><strong>Explanation:<\/strong> If A\u2019s efficiency = 3 units\/day, B = 4 units\/day \u2192 Time = 48\/4 = 12<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-time-and-work-in-quantitative-aptitude\"><span class=\"ez-toc-section\" id=\"What_is_Time_and_Work_in_Quantitative_Aptitude\"><\/span>What is Time and Work in Quantitative Aptitude?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong><a href=\"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Time and Work<\/a><\/strong> is a fundamental topic in Quantitative Aptitude that deals with measuring the efficiency of individuals or machines performing tasks over time. It builds upon concepts from ratio and proportion, unitary method, and LCM.<\/p>\n\n\n\n<p>This topic is common in almost all competitive exams because it tests logical reasoning, speed, and the ability to manage complex calculations under time pressure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-skills-required\">Skills Required:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Basic arithmetic (LCM, ratios, percentages)<\/li>\n\n\n\n<li>Logical sequencing<\/li>\n\n\n\n<li>Efficiency-based calculations<\/li>\n\n\n\n<li>Time-speed optimization<\/li>\n<\/ul>\n\n\n\n<p>Read other Time and Work related blogs:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Time and Work Practice Blogs<\/strong><\/th><th><strong>Exam-Specific Practice Blogs<\/strong><\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/www.oliveboard.in\/blog\/time-and-work-qs-ibps\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Time and Work Questions for IBPS Exams<\/a><\/td><td><a href=\"https:\/\/www.oliveboard.in\/blog\/data-interpretation-based-time-and-work\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Data Interpretation Based on Time and Work<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.oliveboard.in\/blog\/ssc-chsl-time-and-work-questions\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Time and Work Questions for SSC CHSL<\/a><\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-is-time-and-work-important-in-competitive-exams\"><span class=\"ez-toc-section\" id=\"Why_is_Time_and_Work_Important_in_Competitive_Exams\"><\/span>Why is Time and Work Important in Competitive Exams?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Understanding Time and Work helps candidates solve a wide range of real-life and exam-oriented problems involving jobs completed by people, machines, or groups in a given time.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Exam<\/strong><\/td><td><strong>No. of Questions<\/strong><\/td><td><strong>Difficulty<\/strong><\/td><\/tr><tr><td>SSC CGL \/ CHSL<\/td><td>1-2<\/td><td>Easy<\/td><\/tr><tr><td>IBPS PO \/ SBI PO<\/td><td>1-2<\/td><td>Moderate<\/td><\/tr><tr><td>RRB NTPC \/ Group D<\/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=contac-acb\" 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-time-and-work-quantitative-aptitude-short-notes\"><span class=\"ez-toc-section\" id=\"Time_and_Work_Quantitative_Aptitude_Short_Notes\"><\/span>Time and Work Quantitative Aptitude Short Notes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Some of the important notes aspirants must keep in mind while solving questions based on Time and Work 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>Work<\/td><td>The total task to be done (generally considered as 1 unit unless specified).<\/td><\/tr><tr><td>Efficiency<\/td><td>Amount of work done per unit of time.<\/td><\/tr><tr><td>Time<\/td><td>The duration taken to complete the work.<\/td><\/tr><tr><td>LCM Approach<\/td><td>Used to assume total work for simplifying calculations.<\/td><\/tr><tr><td>Work and Wages<\/td><td>Wages are distributed in the ratio of work done.<\/td><\/tr><tr><td>Alternate Work<\/td><td>Situations where different persons work on alternate days.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-concepts-used-in-time-and-work-questions\"><span class=\"ez-toc-section\" id=\"Concepts_Used_in_Time_and_Work_Questions\"><\/span>Concepts Used in Time and Work Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The concepts used in Time and Work 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>Basic Formula<\/td><td>Work = Rate \u00d7 Time<\/td><\/tr><tr><td>Efficiency Comparison<\/td><td>More efficiency \u2192 Less time<\/td><\/tr><tr><td>Total Work<\/td><td>Often assumed as LCM of individual times<\/td><\/tr><tr><td>Combined Work<\/td><td>1\/A + 1\/B for A and B working together<\/td><\/tr><tr><td>Negative Work<\/td><td>Used when a pipe\/person does the opposite of the task (like leakage\/draining)<\/td><\/tr><tr><td>One Day\u2019s Work<\/td><td>1\/Total time to complete the job<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-are-the-types-of-time-and-work-questions-in-quantitative-aptitude\"><span class=\"ez-toc-section\" id=\"What_are_the_Types_of_Time_and_Work_Questions_in_Quantitative_Aptitude\"><\/span>What are the Types of Time and Work Questions in Quantitative Aptitude?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Types of Time and Work questions commonly asked are as follows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Direct Time-Efficiency Problems<\/strong>: Basic questions using formula Work = Time \u00d7 Efficiency<\/li>\n\n\n\n<li><strong>Combined Work<\/strong>: Two or more persons working together or alternately<\/li>\n\n\n\n<li><strong>Work and Wages<\/strong>: Wages divided in proportion to work done<\/li>\n\n\n\n<li><strong>Pipes and Cisterns<\/strong>: Same logic applied to tanks filled\/drained<\/li>\n\n\n\n<li><strong>Inverse Problems<\/strong>: Work undone or uncompleted scenarios<\/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\/ibps-po-mock-test\/?ref=contac-acb\" 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-time-and-work-formulas-for-quantitative-aptitude\"><span class=\"ez-toc-section\" id=\"Time_and_Work_Formulas_for_Quantitative_Aptitude\"><\/span>Time and Work Formulas for Quantitative Aptitude<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Use these formulas for rapid solving:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Work = Time \u00d7 Efficiency<\/strong><\/li>\n\n\n\n<li><strong>Efficiency = 1 \/ Time<\/strong><\/li>\n\n\n\n<li><strong>If A can do a work in \u2018x\u2019 days, B in \u2018y\u2019 days<\/strong><br>\u2192 Together = xyx+y\\frac{xy}{x + y}x+yxy\u200b days<\/li>\n\n\n\n<li><strong>If total work = W, and A does &#8216;a&#8217; work\/day<\/strong><br>\u2192 Time = W \/ a<\/li>\n\n\n\n<li><strong>Wage Ratio = Work Ratio<\/strong><\/li>\n\n\n\n<li><strong>Alternate Day Work:<\/strong> Use LCM of days worked and alternate pattern tracking<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-time-and-work-tricks-for-ssc-cgl-and-other-exams\"><span class=\"ez-toc-section\" id=\"Time_and_Work_Tricks_for_SSC_CGL_and_Other_Exams\"><\/span>Time and Work Tricks for SSC CGL and Other Exams<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Some of the effective time and work question tricks are as follows:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Assume total work as LCM of given days<\/strong> to simplify complex fractions<\/li>\n\n\n\n<li><strong>Convert time into fractions<\/strong> (like 1\/2 day = 0.5, etc.) for faster calculation<\/li>\n\n\n\n<li><strong>Use unit work approach<\/strong> for one-day or one-hour work logic<\/li>\n\n\n\n<li><strong>Avoid decimal calculations<\/strong> \u2014 work with ratios and LCM<\/li>\n\n\n\n<li><strong>For pipes and cisterns<\/strong>, treat filling as +ve work, draining as \u2013ve work<\/li>\n\n\n\n<li><strong>Reverse engineer<\/strong> the question using options for time-bound mocks<\/li>\n\n\n\n<li><strong>Break alternate day cycles<\/strong> into full and half cycles<\/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=contac-acb\" 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-common-mistakes-to-avoid-while-solving-time-and-work\"><span class=\"ez-toc-section\" id=\"Common_Mistakes_to_Avoid_while_Solving_Time_and_Work\"><\/span>Common Mistakes to Avoid while Solving Time and Work<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>While solving <strong>Time and Work<\/strong> problems in competitive exams, candidates often make avoidable mistakes that lead to incorrect answers.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ignoring unit conversions (e.g., hours to days)<\/strong> \u2013 Always align units before starting calculations.<\/li>\n\n\n\n<li><strong>Not using the LCM method<\/strong> \u2013 Direct fractions can be slow; assuming total work as LCM simplifies the process.<\/li>\n\n\n\n<li><strong>Assuming wrong total work<\/strong> \u2013 Always choose a multiple or LCM of given time durations to avoid errors.<\/li>\n\n\n\n<li><strong>Confusing efficiency with speed<\/strong> \u2013 Efficiency refers to work\/time, not to distance\/time like speed.<\/li>\n\n\n\n<li><strong>Misinterpreting draining\/filling logic<\/strong> \u2013 Treat filling as positive work and draining as negative work, especially in pipe and cistern problems.<\/li>\n<\/ul>\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-1754470115386\"><strong class=\"schema-faq-question\">Q1. What is the basic formula of Time and Work?<\/strong> <p class=\"schema-faq-answer\">Time = Work \u00f7 Efficiency.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754470116635\"><strong class=\"schema-faq-question\">Q2. How do you calculate total work in Time and Work questions?<\/strong> <p class=\"schema-faq-answer\">Assume total work as the LCM of individual time durations.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754470117211\"><strong class=\"schema-faq-question\">Q3. How to calculate combined work of two people?<\/strong> <p class=\"schema-faq-answer\">Add their one-day work: 1\/A + 1\/B.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754470118253\"><strong class=\"schema-faq-question\">Q4. What if one person is more efficient than another?<\/strong> <p class=\"schema-faq-answer\">Use ratio-based comparison to divide work accordingly.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754470118819\"><strong class=\"schema-faq-question\">Q5. How is unitary method used in Time and Work?<\/strong> <p class=\"schema-faq-answer\">Find one-day work first, then multiply or divide to find total time or work.<\/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\/rrb-ntpc-pyps\/\">RRB NTPC 2025 Question Papers, Shift-Wise PYPs, Download PDFs<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-chsl-reasoning-questions\/\">SSC CHSL Reasoning Questions, Download PDF &amp; Attempt Live Quiz<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-stenographer-english-questions\/\">SSC Stenographer English Questions, Attempt Live Quiz<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-cgl-english-questions\/\">SSC CGL English Questions with Answers, Download Free PDF<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-chsl-full-form\/\">SSC CHSL Full Form, All you need to know about SSC CHSL Exam<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/surds-and-indices\/\">Surds and Indices Question Types, Formulas, and Short Tricks<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Time and Work is one of the most common and important topics in the Quantitative Aptitude section of exams like<\/p>\n","protected":false},"author":58,"featured_media":223713,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,10231],"tags":[],"class_list":["post-223701","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bank-exams","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>Time and Work Formula, Concepts, Tricks and Tips<\/title>\n<meta name=\"description\" content=\"Check out the Time and Work formulas, terms, and types of questions asked in the exam, along with time-saving short tricks and tips.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Time and Work Formula, Concepts, Tricks and Tips\" \/>\n<meta property=\"og:description\" content=\"Time and Work is one of the most common and important topics in the Quantitative Aptitude section of exams like SSC, Banking, and Railways. 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I work as a Content Writer at Oliveboard, where I have been simplifying exam-related content for the past 4 years. I create clear and easy-to-understand guides for JAIIB, CAIIB, and UGC exams. My work includes breaking down notifications, admit cards, and exam updates, as well as preparing study plans and subject-wise strategies. My goal is to support working professionals in managing their exam preparation alongside a full-time job and to help them achieve career growth.\",\"sameAs\":[\"www.linkedin.com\/in\/aditi-chakraborty-131b3b379\"]},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/#faq-question-1754470115386\",\"position\":1,\"url\":\"https:\/\/www.oliveboard.in\/blog\/time-and-work-questions\/#faq-question-1754470115386\",\"name\":\"Q1. 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