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Mathematics

Pipes And Cisterns MCQs

Practice Pipes And Cisterns MCQs for competitive exams.

Pipes And Cisterns MCQs

Practice questions from this topic.

Two pipes A and B can fill a cistern in $$12frac{1}{2}$$ hours and 25 hours, respectively. The pipes are opened simultaneously and it is found that due to a leakage in the bottom, it took 1 hour 40 minutes more to fill the cistern. When the cistern is full, in how much time will the leak empty the cistern?

  1. A. 48 hours
  2. B. 45 hours
  3. C. 42 hours
  4. D. 50 hours
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Pipes A and B can fill a tank in one hour and two hours respectively while pipe C can empty the filled up tank in one hour and fifteen minutes. A and C are turned on together at 9 a.m. After 2 hours. Only A is closed and B is turned on. When will the tank be emptied?

  1. A. 12:10 p.m.
  2. B. 11:30 a.m.
  3. C. 10:30 a.m.
  4. D. 12:20 p.m.
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Pipes A, B and C can fill a tank in 30h, 40h and 60h respectively. Pipes A, B and C are opened at 7 a.m., 8 a.m., and 10 a.m., respectively on the same day. When will the tank be full?

  1. A. 10:00 pm
  2. B. 9:20 pm
  3. C. 10:20 pm
  4. D. 9:40 pm
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There are 3 taps, A, B and C, in a tank. These can fill the tank in 10 h, 20 h and 25 h, respectively. At first, all three taps are opened simultaneously. After 2 h, tap C is closed and tap A and B keep running. After 4 h, tap B is also closed. The remaining tank is filled by tap A alone. Find the percentage of work done by tap A itself.

  1. A. 75%
  2. B. 52%
  3. C. 72%
  4. D. 32%
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Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, whereas pipe C and empty the full tank is 40 hours. All three pipes are opened together, but pipe C is closed after 10 hours. After how many hours will the remaining part of the tank be filled?

  1. A. 2
  2. B. $$2frac{1}{2}$$
  3. C. 5
  4. D. $$5frac{1}{2}$$
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Pipes A, B and C can fill an empty tank in $$frac{{30}}{7}$$ hours, if all the three pipes are opened simultaneously. A and B are filling pipes and C is an emptying pipe. Pipe A can fill tank in 15 hours and pipe C can empty it in 12 hours. In how long (in hours) can pipe B alone fill the empty tank?

  1. A. 4
  2. B. 6
  3. C. 3
  4. D. 5
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Pipes A, B and C can fill a tank is 15, 30 and 40 hours, respectively. Pipes A, B and C are opened at 6 a.m., 8 a.m. and 10 a.m., respectively, on the same day. When will the tank be full?

  1. A. 3:20 p.m.
  2. B. 11:20 p.m.
  3. C. 7:20 p.m.
  4. D. 5:20 p.m.
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Two pipes A and B can fill an empty tank in 10 hours and 15 hours respectively. Pipe C alone can empty the completely filled tank in 12 hours. First both pipes A and B are opened and after 5 hours pipe C is also opened. What is the total time (in hours) in which then tank will be filled?

  1. A. 7
  2. B. 5
  3. C. 9
  4. D. 8
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Tap A can fill a tank in 6 hours, tap B can fill the same tank in 8 hours and tap C can empty the same tank in 4 hours. If all three taps A, B and C are opened together, then how much time (in hours) will be taken to fill the tank?

  1. A. 24
  2. B. 30
  3. C. 28
  4. D. 20
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6 pipes, working 10 hours a day, can empty a cistern in 3 days. How many hours a day must 9 pipes work to empty the cistern in one day?

  1. A. 20
  2. B. 12
  3. C. 22
  4. D. 18
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The volume of a tank is 72 cubic metres. Water is poured into it at the rate of 60 litres per minute. How much time will it take to fill the tank?

  1. A. 6 hours
  2. B. 20 hours
  3. C. 12 hours
  4. D. 10 hours
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When operated separately pipe A takes 5 hours less than pipe B to fill a cistern, and when operated together, the cistern gets filled in 6 hours. In how much time (in hours) will pipe A fill the cistern, if operated separately?

  1. A. 10
  2. B. 18
  3. C. 9
  4. D. 15
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