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    Question

    18 workers can complete 9 tasks in 24 hours. Find the time

    required by 12 workers to finish 15 tasks.
    A 25 hrs Correct Answer Incorrect Answer
    B 12 hrs Correct Answer Incorrect Answer
    C 60 hrs Correct Answer Incorrect Answer
    D 28 hrs Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the efficiency of each worker be 'x' tasks per hour

    Let the required time be 't' hours

    Therefore, (18x × 24) / 9 = (12x × t) / 15

    Or, t = (18x × 24 × 15) / (12x × 9) = 60

    Required time = 60 hours

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