Multiple Choice Questions on A large cistern can be filled by two pipes P and Q How many minutes will it take to fill the Cistern........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A large cistern can be filled by two pipes P and Q How many minutes will it take to fill the Cistern...........

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    Time taken by the pipes to fill a tank/cistern (hours/minutes)

    A large cistern can be filled by two pipes P and Q. How many minutes will it take to fill the Cistern from an empty state if Q is used for half the time and P and Q fill it together for the other half?

     

    6.5 minutes

    Incorrect Answer

    7.5 minutes

    Correct Answer

    8.5 minutes

    Incorrect Answer

    9.5 minutes

    Incorrect Answer
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    Explanation:

    Explanation :
    Part filled by P and Q = 1/15 + 1/10 = 1/6
    Part filled by Q = 1/10
    x/2(1/6 + 1/10) = 2/15 = 15/2 = 7.5 minutes

    By: Pranav Gupta
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