Multiple Choice Questions on Pipe A can fill a tank in 72 minutes and pipe B can fill it in 90 minutes If both the pipes are open........... for CDS Exam Preparation

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Multiple Choice Questions

Pipe A can fill a tank in 72 minutes and pipe B can fill it in 90 minutes If both the pipes are open...........

Quantitative Aptitude (CDS) Pipes&cistern
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    Pipe A can fill a tank in 72 minutes and pipe B can fill it in 90 minutes. If both the pipes are opened to fill an empty tank, in how many minutes will it be full?

    18minutes

    Incorrect Answer

    20minutes

    Correct Answer

    25minutes

    Incorrect Answer

    22minutes

    Incorrect Answer
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    Explanation:

    Efficiency of A = 2.77%
    Efficiency of B = 2.22%
    Efficiency of both A and B = 2.22 + 2.77 = 55
    Total minutes =100/5 
    = 20minutes

    By: bhavesh kumar singh
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