Question

    A contractor is hired to complete a road in 40 days and

    initially employs 40 workers. After 24 days, he realizes that only one-third of the work has been completed. How many additional workers must he hire to finish the remaining work 4 days ahead of schedule?
    A 60 Correct Answer Incorrect Answer
    B 75 Correct Answer Incorrect Answer
    C 90 Correct Answer Incorrect Answer
    D 120 Correct Answer Incorrect Answer

    Solution


    Let the number of extra men be ‘m’.

    (40 × 24)/(1/3) = [(40 + m) × 12]/(2/3)

    m = 120

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