Multiple Choice Questions on Two pipes can fill a tank in 10 hours and 12 hours respectively while a third pipe empties the full ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two pipes can fill a tank in 10 hours and 12 hours respectively while a third pipe empties the full ...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    Two pipes can fill a tank in 10 hours and 12 hours respectively while a third pipe empties the full tank in 20 hours.If all the three pipes operate simultaneously, in how much time will the tank be filled?

    7hrs

    Incorrect Answer

    8hrs

    Incorrect Answer

    7hrs 30 min

    Correct Answer

    9hrs 30min

    Incorrect Answer
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    Explanation:

    Answer & Explanation
    Answer – 7hrs 30 min
    Explanation :
    Net apart filled in 1 hour = (1/10+1/12-1/20)
    = 8/60 = 2/15.

    Tank will be full in = 15/2 hours =› 7 hrs 30 min.

    By: Sandeep Dubey
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