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Discussion :: Time and Work

  1. A, B and C can do a work in 90, 30 and 45 days respectively. If they work together, in how many days will they complete the work?
    2. A.
    15
    B.
    10
    C.
    20
    D.
    25
    E.
    None of these

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    Workspace

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    Answer : Option A

    Explanation :

    One days's work of A, B and C = 1/90 + 1/30 + 1/45

    = (1 + 3 + 2)/90 = 1/15

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