Pipe & Cistern for IBPS Clerk 2026: FREE Practice PDF & Live Quiz

1. Pipe A can fill a tank in 12 hours and pipe B can fill it in 18 hours. If both pipes are opened together, in how much time will the tank be filled?

2. Three pipes A, B and C can fill a tank in 12 hours, 18 hours and 36 hours respectively. How long will they take to fill the tank when opened together?

3. Three pipes A, B and C can fill a tank in 18 hours, 24 hours and 72 hours respectively. How long will they take to fill the tank when opened together?

4. An inlet pipe can fill a tank in 10 hours, while a leak can empty the full tank in 15 hours. If both are open together, in how much time will the empty tank be filled?

5. Pipes A and B can fill a tank in 12 hours and 18 hours respectively. Pipe C can empty the full tank in 36 hours. If all three are opened together, how long will the tank take to fill?

6. Pipe A can fill a tank in 12 hours. Together, pipes A and B fill it in 8 hours. In how much time can pipe B alone fill the tank?

7. A pipe can fill a tank in 12 hours. Because of a leak, the tank takes 18 hours to fill. In how much time can the leak empty the full tank?

8. Pipes A and B can fill a tank in 24 hours and 12 hours respectively. They are opened together, but pipe B is closed after 4 hours. How much total time will be required to fill the tank?

9. Pipes A and B can fill a tank in 20 hours and 30 hours respectively. They are opened together, but pipe B is closed after 3 hours. How much total time will be required to fill the tank?

10. Pipe A can fill a tank in 24 hours and pipe B in 12 hours. Pipe A is opened first, and pipe B is opened 6 hours later. How much time from the start will the tank take to fill?

11. Pipe A can fill a tank in 10 hours and pipe B in 15 hours. They are opened alternately for one hour each, beginning with pipe A. In how much time will the empty tank be filled?

12. Pipe A can fill a tank in 8 hours and pipe B in 12 hours. They are opened alternately for one hour each, beginning with pipe A. In how much time will the empty tank be filled?

13. Pipe A can fill a tank in 6 hours and pipe B in 10 hours. They are opened alternately for one hour each, beginning with pipe B. In how much time will the empty tank be filled?

14. Pipe A can fill a tank in 12 hours and pipe B in 18 hours. They are opened alternately for 2 hours each, beginning with pipe A. In how much time will the empty tank be filled?

15. A tank of capacity 1,200 litres is connected to an inlet supplying 80 litres per minute and an outlet discharging 20 litres per minute. If both are open, how long will the empty tank take to fill?

16. A pipe supplies water at 80 litres per minute and fills a tank in 45 minutes. What is the capacity of the tank?

17. A tank is already one-fourth full. A pipe can fill the entire tank in 24 hours. How much more time will the pipe need to fill the tank?

18. A pipe fills three-fifths of a tank in 9 hours. In how much time can it fill the entire tank at the same rate?

19. An outlet empties two-thirds of a full tank in 12 hours. In how much time can it empty the entire tank?

20. A pipe fills 40% of a tank in 8 hours. How long will it take to fill the whole tank?

21. The filling rates of pipes A and B are in the ratio 3:2. Together they fill a tank in 10 hours. In how much time can pipe A alone fill the tank?

22. Pipe A is 50% more efficient than pipe B. Pipe B alone fills a tank in 30 hours. How long will both take together?

23. A pipe originally fills a tank in 20 hours. Its filling efficiency is increased by 25%. What is its new filling time?

24. A pipe fills a tank in 18 hours. A leak removes water at 40% of the pipe’s filling rate. If both operate together, how long will the tank take to fill?

25. The times taken by pipes A and B to fill a tank are in the ratio 2:3, and their individual times differ by 10 hours. How long will they take together?

26. Pipe A can fill a tank in 24 hours. It is opened alone for 6 hours, after which a leak starts. The tank becomes full 30 hours after A was first opened. In how much time can the leak empty the full tank?

27. Pipes A and B fill a tank in 12 hours and 18 hours, while pipe C empties it in 36 hours. All three are opened together. After 3 hours, C is closed. Find the total filling time.

28. Pipe A fills a tank in 16 hours and pipe B in 48 hours. A is opened at 8:00 a.m., and B is opened at 12:00 noon. At what time will the tank be full?

29. A tank is initially 40% full. An inlet can fill the complete tank in 25 hours, while a leak can empty it in 50 hours. If both are opened, how long will the tank take to become full?

30. Pipe A can fill a tank in 24 hours. Pipe B can fill it in 12 hours and pipe C in 8 hours. A is opened first, B is opened 2 hours later, and C is opened 2 hours after B. Find the total filling time from the moment A is opened.