Multiple Choice Questions on A man and a woman do a piece of work in 10 days a woman and a boy do in 15 days and boy and man doin........... for CDS Exam Preparation

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Multiple Choice Questions

A man and a woman do a piece of work in 10 days a woman and a boy do in 15 days and boy and man doin...........

Quantitative Aptitude (CDS) Time and work
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    A man and a woman do a piece of work in 10 days, a woman and a boy do in 15 days, and boy and man doing in 20 days, a boy along can do the work in:

     

    120 days
     

    Correct Answer

    50 days
     

    Incorrect Answer

    100 days
     

    Incorrect Answer

    80 days

    Incorrect Answer
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    Explanation:

    According to questions,
    (Man+woman+boy ) work 13/2 units/day
    (Man +woman) work 6 unit/day
    Boy work/day = (man+woman+boy)-(man+woman)
    = 13/2- 6/1 = 1/2 unit/day
    Boy will finish in 60/1/2 = 120days.

    By: bhavesh kumar singh
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