Multiple Choice Questions on X can do a piece of work in 39 p 39 days and Y can do the same work in 39 q 39 days Then the number ........... for SSC CGL Exam Preparation

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Multiple Choice Questions

X can do a piece of work in 39 p 39 days and Y can do the same work in 39 q 39 days Then the number ...........

Quantitative Aptitude (CGL) Time and work
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    X can do a piece of work in 'p' days and Y can do the same work in 'q' days. Then the number of days in which X and Y can together do that work is

    p+q/2

    Incorrect Answer

    1/p + 1/q

    Incorrect Answer

    pq/p+q

    Correct Answer

    pq

    Incorrect Answer
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    Explanation:

    X’s one day’s work =1/p;
    Y’s one day’s work =1/q;
    (X + Y)’s day’s work = 1/p + 1/q;
    Hence, X and Y both can do that work = 1/(p+q/pq)=pq/(p+q).

    By: MIRZA SADDAM HUSSAIN
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