Multiple Choice Questions on A cistern has a leak which would empty the cistern in 10 minutes A tap is turned on which admits 4 l........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A cistern has a leak which would empty the cistern in 10 minutes A tap is turned on which admits 4 l...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    A cistern has a leak which would empty the cistern in 10 minutes. A tap is turned on which admits 4 liters a minute into the cistern, and it is emptied in 15 minutes. How many liters does the cistern hold?

    120litres

    Correct Answer

    115litres

    Incorrect Answer

    .110litres

    Incorrect Answer

    130litres

    Incorrect Answer
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    Explanation:

    1/x – 1/10 = -1/15
    1/x = -1/15+1/10
    = -10+15/150 = 5/150
    1/x = 1/30
    X=30
    4x = 30*4 = 120litres

    Hence, option 1 is the correct answer.

    By: Amit Kumar
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