Multiple Choice Questions on Two pipes P and Q can fill a cistern in 12 hours and 4 hours respectively If they are opened on alte........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two pipes P and Q can fill a cistern in 12 hours and 4 hours respectively If they are opened on alte...........

Quant (SSC) Pipes&cistern
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    Two pipes P and Q can fill a cistern in 12 hours and 4 hours respectively. If they are opened on alternate hours and if pipe A is opened first, in how many hours will the tank be full?

    4 hours

    Incorrect Answer

    5 hours

    Incorrect Answer

    2 hours

    Incorrect Answer

    6 hours

    Correct Answer
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    Explanation:

    Pipe P can fill = 1/12
    Pipe Q can fill = 1/4
    For every two hour, 1/12 + 1/4
    = 1/3 Part filled
    Total = 6 hours
    Hence, option 4 is the correct answer.

    By: Amit Kumar
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