Pipe and Cistern Questions Practice Question and Answer

Q:

A tank is fitted with two taps. The first tap can fill the tank completely in 45 minutes and the second tap can empty the full tank in one hour. If both the taps are opened alternately for one minute, then in how many hours the empty tank will be filled completely?

2307 0

  • 1
    2 hours 55 minutes
    Correct
    Wrong
  • 2
    3 hours 40 minutes
    Correct
    Wrong
  • 3
    4 hours 48 minutes
    Correct
    Wrong
  • 4
    5 hours 53 minutes
    Correct
    Wrong
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Answer : 4. "5 hours 53 minutes"

Q:

Two pipes P and Q would fill a cistern in 24 hours and 32 hours respectively. If both pipes are opened together, find when the pipe “P” must be turned off so that the cistern may be just filled in 16 hours-

528 0

  • 1
    After 8 hrs
    Correct
    Wrong
  • 2
    After 12 hrs
    Correct
    Wrong
  • 3
    After 14 hrs
    Correct
    Wrong
  • 4
    After 16 hrs
    Correct
    Wrong
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Answer : 2. "After 12 hrs"

Q:

A pipe of diameter ‘d’ can drain a certain water tank in 40 minutes. The time taken by a pipe of diameter ‘2d’ for doing the same job in: 

1415 0

  • 1
    5 minutes
    Correct
    Wrong
  • 2
    10 minutes
    Correct
    Wrong
  • 3
    20 minutes
    Correct
    Wrong
  • 4
    80 minutes
    Correct
    Wrong
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Answer : 2. "10 minutes "

Q:

A cistern has 3 pipes A, B and C. A and B can fill it in 3 and 4 hours respectively, and C can empty it in 1 hour. If the pipes are opened at 3 p.m., 4 p.m. and 5 p.m. respectively on the same day, the cistern will be empty at-

652 0

  • 1
    7.12 p.m.
    Correct
    Wrong
  • 2
    7.15 p.m.
    Correct
    Wrong
  • 3
    7.10 p.m.
    Correct
    Wrong
  • 4
    7.18 p.m.
    Correct
    Wrong
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Answer : 1. "7.12 p.m."

Q:

 Pipe A alone & pipe B alone can fill the same tank in 5 hours and 4 hours respectively. If the ratio of efficiency of pipe A & B together to that of pipe C alone is 9:2, then find time taken by pipe C alone to fill the same tank?

839 0

  • 1
    8 hours
    Correct
    Wrong
  • 2
    5 hours
    Correct
    Wrong
  • 3
    6 hours
    Correct
    Wrong
  • 4
    10 hours
    Correct
    Wrong
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Answer : 4. "10 hours"

Q:

A tank can be filled with water by two pipes A and B together in 36 minutes. If the pipe B was closed after 30 minutes, the tank is filled in 40 minutes. The pipe B can alone fill the tank in?

542 0

  • 1
    45 minutes
    Correct
    Wrong
  • 2
    60 minutes
    Correct
    Wrong
  • 3
    75 minutes
    Correct
    Wrong
  • 4
    90 minutes
    Correct
    Wrong
  • 5
    85 minutes
    Correct
    Wrong
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Answer : 4. "90 minutes"

Q:

Two pipe A and B can fill a tank in 16 hrs and 12 hrs respectively. The capacity of the tank is 240 litres. Both the pipes are opened simultaneously and closed after 2 hrs. How much more water (In Liters) needed to fill the tank?

583 0

  • 1
    100
    Correct
    Wrong
  • 2
    170
    Correct
    Wrong
  • 3
    70
    Correct
    Wrong
  • 4
    190
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 2. "170"

Q:

One filling pipe P is three times faster than another filling pipe Q, if P can fill tank in 24 hours, then what is the time taken to completely fill the tank if both the pipes are opened together?

620 0

  • 1
    12 hours
    Correct
    Wrong
  • 2
    18 hours
    Correct
    Wrong
  • 3
    16 hours
    Correct
    Wrong
  • 4
    14 hours
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 2. "18 hours"

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