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    Question

    In an office, an employee plans to do a work in 12 days

    with 4 laptops. But after 4 days, he found that only 40% of the work is done with the laptops working for 4 hours a day. If he want to complete the work in the planned time with the laptops, how many hours per day the laptops have to work?
    A 6 hours Correct Answer Incorrect Answer
    B 4 hours Correct Answer Incorrect Answer
    C 5 hours Correct Answer Incorrect Answer
    D 3 hours Correct Answer Incorrect Answer

    Solution

    Laptops  do 40% of the work in 4 days, or 4 × 4 = 16 hours. So the rest of the (i.e., 60% of the work) can be done in, => (60 × 16)/40 = 24 hours This 24 hours of work has to be done in the remaining (12 – 4) = 8 days. Laptops  have to work (24/8) = 3 hours a day to complete the work in the planned time.

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