Multiple Choice Questions on Two pipes P and Q can fill a tank in 8 hours If only pipe P is open then it would take 4 hours longe........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two pipes P and Q can fill a tank in 8 hours If only pipe P is open then it would take 4 hours longe...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    Two pipes P and Q can fill a tank in 8 hours. If only pipe P is open then it would take 4 hours longer to fill the tank. Find how much longer would it take if only pipe Q is open.

    16hrs

    Correct Answer

    12hrs

    Incorrect Answer

    10hrs

    Incorrect Answer

    8hrs

    Incorrect Answer
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    Explanation:

    Answer & Explanation
    Answer – A.16hrs
    Explanation :
    P= 8+4 = 12
    P+Q= 1/8
    Q= 1/8 – 1/12 = 3-2/24 = 1/24
    Q= 24
    Q alone= 24-8 = 16

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