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    Question

    Twelve men working for 9 hours a day complete a piece of

    work in 24 days. In how many days can 8 men working for 12 hours a day complete the same piece of work?
    A 27 days Correct Answer Incorrect Answer
    B 28 days Correct Answer Incorrect Answer
    C 21 days Correct Answer Incorrect Answer
    D 24 days Correct Answer Incorrect Answer

    Solution

    Work = men Ă— hours/day Ă— days For first group: 12Ă—9Ă—24=2592 man-hours For second group: men Ă— hours/day Ă— days = 8Ă—12Ă—d 96d=2592 d=2592Ă·96=27

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