Multiple Choice Questions on A pipe can fill a tank in 20 minutes but due to a leak develop at the bottom of the tank 1 5 of the ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A pipe can fill a tank in 20 minutes but due to a leak develop at the bottom of the tank 1 5 of the ...........

Quant (SSC) Pipes&cistern
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    A pipe can fill a tank in 20 minutes but due to a leak develop at the bottom of the tank, 1/5 of the water filled by the pipe leaks out. Find the time in which the tank is filled.

    20 min

    Incorrect Answer

    25 min

    Correct Answer

    30 min

    Incorrect Answer

    can’t be determined

    Incorrect Answer
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    Explanation:

    Amount of tank filled by the pipe in one minute = 1/20 and due to leakage 1/5 of 1/20 leaks out so,
    [1/20 – (1/5)*(1/20)]*T = 1
    We get T = 25

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