Practice test

Pipe and cistern - Test Set 2

Review 5 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

5 questions

Questions and explanations

  1. Question 1

    Three pipes P, Q and R can separately fill a tank in 10, 15 and 20 hours. P was filled at 7 am, Q at 8 am, and R at 9 am. By what time will the tank be completely filled, if R can work only for a period of 3 hours at a time and after that he has to stop for 1 hour?
    1. 12:00 pm
    2. 12:12 pm
    3. 12:30 pm
    4. 1:00 pm
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  2. Question 2

    Two pipes A and B can fill a tank in 25 minutes and half an hour respectively and pipe C can empty three gallons per minute. If all three pipes are operated together, the tank is filled in 15 minutes. Find the capacity of the tank.
    1. 600 Gallon
    2. 240 Gallon
    3. 450 Gallon
    4. 300 Gallon
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  3. Question 3

    There is a leak (hole) in a tank which can empty it in 8 hours. Another pipe is fitted to the tank, which can fill 6 liters of water per hour. The pipe is opened, but due to leakage, the tank becomes empty in 12 hours. What is the capacity of the tank?
    1. 80 Liter
    2. 120 Liter
    3. 144 Liter
    4. 78 Liter
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  4. Question 4

    There are 3 taps for filling water in a tank. The first tap takes 6 hours, the second tap takes 1 day and the third tap takes 18 hours to fill the tank. But there was a hole in the bottom, which was capable of draining a completely filled tank in 18 hours. The hole was discovered after 1 hour and was immediately repaired. How much time will it take to fill the tank from all three taps?
    1. 4 hrs
    2. 3 hrs
    3. 2 hrs
    4. 1 hrs
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  5. Question 5

    A pipe can fill a water tank in 12.5 hours. There was a leak at the bottom of the tank, due to which the entire tank could be drained in 17.5 hours. The leak was stopped after 14 hours of opening the pipe to fill the tank. What was the total time (in hours) taken to fill the tank?
    1. 22.5
    2. 20.5
    3. 27
    4. 25
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