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    Question

    Thirty men working 8 hours daily

    complete a task in 16 days. If the work increases to three times the original and needs to be finished in 20 days by workers putting in 6 hours per day with a 20% increase in their efficiency, how many men are required?
    A 75 Correct Answer Incorrect Answer
    B 80 Correct Answer Incorrect Answer
    C 65 Correct Answer Incorrect Answer
    D 92 Correct Answer Incorrect Answer

    Solution

    ATQ, Let the total work be 'W' units and eiciency of each man be 'E' units/hour Let the number of men required be 'M'. ATQ: {(30 X 16 X 8 X E)/W} = {(M X 20 X 1.2E X 6)/(3 X W)} Or, M = 80

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