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    Question

    (N+18) persons, each working for 7.5 hours a day, can

    complete 48% of a work in 20 days. (N+12) persons can complete the remaining work in 30 days, if each of them works for 6.5 hours per day. Determine the value of N.
    A 18 Correct Answer Incorrect Answer
    B 16 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 22 Correct Answer Incorrect Answer

    Solution

    ATQ- (N + 18) x 7.5 x 20/48 = (N + 12) x 30 x 6.5/52 (N + 18) × 7800 = (N + 12) x 9360 (N + 18) x 780 = (N + 12) × 936 780 N + 14040= 936N + 11232 156N = 2808 N = 2808/156 = 18

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