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Discussion :: Time and Work

  1. A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:

    2. A.
    4 days
    B.
    6 days
    C.
    8 days
    D.
    12 days

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    Answer : Option B

    Explanation :

    Suppose A, B and C take x, x and x days respectively to finish the work.
    2 3
    Then, 1-sym-oparen-h1 1 + 2 + 3 1-sym-cparen-h1 = 1
    x x x 2
    6 = 1
    x 2

     x = 12.

    So, B takes (12/2) = 6 days to finish the work.

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