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      Question

      A can finish a piece of work in 6 days and B can finish

      it in 12 days. In how many days will they finish the work together?
      A 5 days Correct Answer Incorrect Answer
      B 4 days Correct Answer Incorrect Answer
      C 2 days Correct Answer Incorrect Answer
      D 8 days Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Work done by A in 1 day = 1/6 Work done by B in 1 day = 1/12 Together in 1 day: 1/6 + 1/12 = 2/12 + 1/12 = 3/12 = 1/4 So they complete the work in 4 days.

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