Multiple Choice Questions on A cistern has a leak that can empty it alone in 8 hours A tap is turned on which admits 6 lite........... for CDS Exam Preparation

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Multiple Choice Questions

A cistern has a leak that can empty it alone in 8 hours A tap is turned on which admits 6 lite...........

Quantitative Aptitude (CDS) Pipes&cistern
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     A cistern has a leak that can empty it alone in 8 hours. A tap is turned on which admits 6 liters of water per minute into the cistern. If both the pipes are opened simultaneously then the cistern gets completely emptied in 12 hours. How many liters of water can the cistern hold, If there is no hole?

    6480 liters

    Incorrect Answer

    4860 liters

    Incorrect Answer

    8460 liters

    Incorrect Answer

    8640 liters

    Correct Answer
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    Explanation:

    -12/2 + 12/x = -1
    12/x = -1+3/2
    12/x = 1/2
    x = 24 liters
    1 minute -> 6 liters
    6×24×60 = 360×24
    = 8640 liters

    By: bhavesh kumar singh
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