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Discussion :: Time and Work

  1. A can do a piece of work in 10 days. He works at it for 4 days and then B finishes it in 9 days. In how many days can A and B together finish the work?
    2. A.
    6 days
    B.
    8 days
    C.
    8 ½ days
    D.
    7 ½ days

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    Workspace

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    Answer : Option A

    Explanation :

    4/10 + 9/x = 1 => x = 15

    1/10 + 1/15 = 1/6 => 6 days

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