Multiple Choice Questions on A B and C can all together do piece of work in 20 days in which B takes twice as long as A and C tog........... for Graduation cum Career Security Preparation

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Multiple Choice Questions

A B and C can all together do piece of work in 20 days in which B takes twice as long as A and C tog...........

Quantitative Aptitude (CCS) Time and work
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    A, B and C can all together do piece of work in 20 days, in which B takes twice as long as A and C together do the work and C takes twice as long as A and B together take to do the work. In how many days B can alone do the work?

    40

    Incorrect Answer

    35

    Incorrect Answer

    60

    Correct Answer

    45

    Incorrect Answer
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    Explanation:

    Solution: 
    (A+C) in x days so B completes in 2x days
    then (1/x) + (1/2x) = 1/20
    solve, x = 30
    so B 2x =60days

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