Multiple Choice Questions on A B and C can do a piece of work in 8 days B and C together do it in 24 days B alone can do it in 40........... for Civil Services Exam (CSAT) Preparation

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Multiple Choice Questions

A B and C can do a piece of work in 8 days B and C together do it in 24 days B alone can do it in 40...........

Math and Mental Ability Time and work
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    A, B, and C can do a piece of work in 8 days. B and C together do it in 24 days. B alone can do it in 40 days. In what time will it be done by C working alone?

    68

    Incorrect Answer

    48

    Incorrect Answer

    60

    Correct Answer

    24

    Incorrect Answer
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    Explanation:

    B & C do this work in 24 days. 
    B alone does this work in 40 days.  
    C alone will take 1/24 – 1/40 = 2/120=1/60 
    ⇒ 60 days to finish the work.

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