Multiple Choice Questions on Two taps can fill a tank in 3 and 4 hours respectively A drain pipe can empty the tank in 2 hours If........... for CDS Exam Preparation

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Multiple Choice Questions

Two taps can fill a tank in 3 and 4 hours respectively A drain pipe can empty the tank in 2 hours If...........

Quantitative Aptitude (CDS) Pipes&cistern
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    Two taps can fill a tank in 3 and 4 hours respectively.A drain pipe can empty the tank in 2 hours. If three pipes opened together, then the tank will be filled in how much time? 

    12 hours

    Correct Answer

    10 hours

    Incorrect Answer

    9 hours

    Incorrect Answer

    8 hours

    Incorrect Answer
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    Explanation:

    let it take t time to fill the tank
     t(1/3 +1/4 -1/2)=1
     t(1/12)=1
     t=12 

    By: bhavesh kumar singh
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