Multiple Choice Questions on The quantity of water in a cistern doubles every minute It gets filled in 60 minutes In how many min........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The quantity of water in a cistern doubles every minute It gets filled in 60 minutes In how many min...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    The quantity of water in a cistern doubles every minute. It gets filled in 60 minutes. In how many minutes will it be half filled?

    20

    Incorrect Answer

    30

    Incorrect Answer

    40

    Incorrect Answer

    59

    Correct Answer
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    Explanation:
    59 minutes. say it is a 100 litre cistern, at 59 minutes it will have 50 litres,
    then at 60 minutes it will have double that which is 100 litres.
    Hence, option 4 is the correct answer.

    By: Sandeep Dubey
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