Multiple Choice Questions on P can do a piece of work in 20 days Q is 25 percent more efficient than P In how many days half the ........... for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

P can do a piece of work in 20 days Q is 25 percent more efficient than P In how many days half the ...........

Quantitative Aptitude (RRB NTPC) Time and work
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    P can do a piece of work in 20 days. Q is 25 percent more efficient than P. In how many days half the work is completed when both are working simultaneously?

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    40/9

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    39/9

    Incorrect Answer

    43/9

    Incorrect Answer
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    Explanation:

    Q is 25 percent more efficient so he will complete the work in 16 days
    (1/20 + 1/16) × t = 1/2

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