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Discussion :: Time and Work

  1. A and B can do a work in 12 days, B and C in 15 days, C and A in 20 days. If A, B and C work together, they will complete the work in?
    2. A.
    5 days
    B.
    7 5/6 days
    C.
    10 days
    D.
    15 2/3 days

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    Workspace

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    Answer : Option C

    Explanation :

    (A + B)'s 1 day work = 1/12;

    (B + C)'s 1 day work = 1/15;

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