Multiple Choice Questions on A and B can do a piece of work in 72 days B and C can do it in 120 days C and A can do it in 90 days........... for HCS Exam Preparation

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Multiple Choice Questions

A and B can do a piece of work in 72 days B and C can do it in 120 days C and A can do it in 90 days...........

Quantitative Aptitude (HCS) Time and work
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    A and B can do a piece of work in 72 days. B and C can do it in 120 days. C and A can do it in 90 days. In how many days all three together can do the work?

    80 days

    Incorrect Answer

    120 days

    Incorrect Answer

    100 days

    Incorrect Answer

    60 days

    Correct Answer
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    Explanation:

    Solution:
    (total work=360)
    A+B= 72————-5
    B+C=120————3
    C+A=90————–4
    =>2(A+B+C)=12
    A+B+C=6
    total days=360/6=60 days

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