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Discussion :: Time and Work

  1. A, B and C can do a piece of work in 7 days, 14 days and 28 days respectively. How long will they taken, if all the three work together?
    2. A.
    3 days
    B.
    4 days
    C.
    5 days
    D.
    6 days

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    Workspace

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    Answer : Option B

    Explanation :

    1/7 + 1/14 + 1/28 = 7/28 = 1/4 => 4 days

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