Multiple Choice Questions on Pipe A and Pipe B can fill a cistern in 12 hours and 15 hours respectively When a third pipe C which........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Pipe A and Pipe B can fill a cistern in 12 hours and 15 hours respectively When a third pipe C which...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    Pipe A and Pipe B can fill a cistern in 12 hours and 15 hours respectively. When a third pipe C which works as an outlet pipe is also open then the cistern can be filled in 20 hours. The outlet pipe can empty a full cistern in

    13days

    Incorrect Answer

    15days

    Incorrect Answer

    10days

    Correct Answer

    8days

    Incorrect Answer
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    Explanation:

    Let the pipe C empty the tank in x hrs.
    1/12 +1/15 -1/x=1/20
    1/12+1/15-1/20 =1/x
    1/x=1/10
    x=10days.

    By: Pranav Gupta
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