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      Question

      In an office, an employee plans to do a work in 15 days

      with 6 laptops. But after 8 days, he found that only 50% of the work is done with the laptops working for 7 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 12 hours Correct Answer Incorrect Answer
      C 9 hours Correct Answer Incorrect Answer
      D 10 hours Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Laptops do 50% of the work in 8 days, or 8 × 7 = 56 hours. So the rest of the (i.e., 50% of the work) can be done in, => (50 × 56)/50 = 56 hours This 56 hours of work has to be done in the remaining (15 – 8) = 7 days. Laptops have to work (56/7) = 8 hours a day to complete the work in the planned time.

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