Multiple Choice Questions on Two pipes A and B can fill a tank in 20 and 16 hours respectively Pipe B alone is kept open for 1 4 ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two pipes A and B can fill a tank in 20 and 16 hours respectively Pipe B alone is kept open for 1 4 ...........

Quantitative Aptitude ( CCS) Pipes&cistern
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    Two pipes A and B can fill a tank in 20 and 16 hours respectively. Pipe B alone is kept open for 1/4 of time and both pipes are kept open for remaining time. In how many hours, the tank will be full?

    18 hours

    Incorrect Answer

    20 hours

    Incorrect Answer

    10 hours

    Correct Answer

    12 hours

    Incorrect Answer
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    Explanation:

     Let the required time be x hours, then 1/16(x/4)+(x-x/4)1/16+(x-x/4)=1
    ⇒ x/16+3x/80 = 1⇒ x= 11=10 hours.

    By: MIRZA SADDAM HUSSAIN
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