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      Question

      A and B together can complete a piece of work in

      32 days while A alone can complete 40% of the work in 32 days. Find the time taken by B to complete 60% of the work.
      A 34 days Correct Answer Incorrect Answer
      B 36 days Correct Answer Incorrect Answer
      C 32 days Correct Answer Incorrect Answer
      D 35 days Correct Answer Incorrect Answer
      E 30 days Correct Answer Incorrect Answer

      Solution

      Time taken by A to complete the whole work = 32/0.40 = 80 days
      Let total work = 160 units
      Amount of work done by A and B together in one day = 160/32 = 5 units
      Amount of work done by A alone in one day = 160/80 = 2 units
      Amount of work done by B in one day = 5 – 2 = 3 units
      Desired time = 0.60 × 160/3 = 32 days

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