This is aptitude questions and answers section on Pipes and Cisterns with an explanation for various interview, competitive examinations, and entrance tests.
__Pipes and Cistern Online Test - Pipes and Cistern Quiz Details__

__Pipes and Cistern Formulas__

If a pipe can fill a tank in X hours, then, the part filled by 1 hours = one / X.

If a pipe can be vacant a tank in Y hours, then, part emptied in 1 hours = 1 / Y.

If a pipe can fill a tank in X hours and another pipe can vacant the full tank in Y hours, then on opening both the pipes, the net part filled in 1 hours = (1 / X) (1 / Y).

If a pipe can fill a tank in X hours and another pipe can empty the full tank in Y hours, then on opening both the pipes, the remaining part emptied in 1 hours = (1 / Y) (1 / X).

Online Test Name |
Pipes and Cistern |

Exam Type |
Multiple Choice Questions |

Category |
Aptitude Quiz |

Number of Questions |
52 |

If a pipe can be vacant a tank in Y hours, then, part emptied in 1 hours = 1 / Y.

If a pipe can fill a tank in X hours and another pipe can vacant the full tank in Y hours, then on opening both the pipes, the net part filled in 1 hours = (1 / X) (1 / Y).

If a pipe can fill a tank in X hours and another pipe can empty the full tank in Y hours, then on opening both the pipes, the remaining part emptied in 1 hours = (1 / Y) (1 / X).

1. Two pipes A and B can fill a cistern in 20 and 30 minutes respectively, and a third pipe C can empty it in 40 minutes. How long will it take to fill the cistern if all the three are opened at the same time?
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2. Two pipes A and B can separately fill a tank in 2 minutes and 15 minutes respectively. Both the pipes are opened together but 4 minutes after the start the pipe A is turned off. How much time will it take to fill the tank?
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3. Two pipes P and Q can fill a cistern in 12 and 15 minutes respectively. Both are opened together, but at the end of 3 minutes the first is turned off. How much longer will the cistern take to fill?
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4. A cistern has a leak which would empty the cistern in 20 minutes. A tap is turned on which admits 4 liters a minute into the cistern, and it is emptied in 24 minutes. How many liters does the cistern hold?
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5. Two taps can separately fill a cistern 10 minutes and 15 minutes respectively and when the waste pipe is open, they can together fill it in 18 minutes. The waste pipe can empty the full cistern in?
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