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Discussion :: Time and Work

  1. Two men and three women working 7 hours a day finish a work in 5 days. Four men and four women working 3 hours a day complete the work in 7 days. The number of days in which only 7 men working 4 hours a day will finish the work is?
    2. A.
    5 days
    B.
    6 days
    C.
    7 days
    D.
    10 days

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    Answer : Option A

    Explanation :

    2M + 3W ----- 35 h

    4M + 4W ------- 21 h

    7M -------? d

    70M + 105W = 84M +84M

    21W = 14M => 2M = 3W

    4 * 35 = 7 * x => x = 20 hours

    20/4 = 5 days

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