Multiple Choice Questions on A leak in the bottom of a tank can empty the full tank in 7 hours An inlet pipe fills water at the r........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A leak in the bottom of a tank can empty the full tank in 7 hours An inlet pipe fills water at the r...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    A leak in the bottom of a tank can empty the full tank in 7 hours. An inlet pipe fills water at the rate of 2 litres a minute. When the tank is full the inlet is opened and due to the leak the tank is empty in 8 hours. The capacity of the tank in litres is

    3450litres

    Incorrect Answer

    5460litres

    Incorrect Answer

    7620litres

    Incorrect Answer

    6720 litres

    Correct Answer
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    Explanation:

    In 1 hr = 1/7 – 1/8 = 8-7/56 = 1/56
    In 1 min = 1/(56*60) = 1/3360
    Inlet pipe fill water at the rate of 2 liters a minute = 2*3360 = 6720litres

    Hence, option 4 is the correct answer.

    By: Amit Kumar
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