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    Question

    If Neha can complete a work in 40 days by working 5 hours a

    day, how many hours per day should she work to complete the same work in 25 days?
    A 10 hrs Correct Answer Incorrect Answer
    B 8 hrs Correct Answer Incorrect Answer
    C 12 hrs Correct Answer Incorrect Answer
    D 24 hrs Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the efficiency of Neha be 'x' units per hour

    Therefore, total work = 5 × 40 × x = 200x units

    Let the time she should work to complete the work in 25 days be 'y' hours a day.

    ATQ;

    200x = 25 × y × x

    Or, y = 8

    Therefore, she should work for 8 hours a day.

    Alternate solution:

    Required time = (5 × 40) ÷ 25 = 8 hours

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