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      Question

      A can complete a piece of work in 20 days. B can

      complete the same work in 36 days. If A and B work together, then the number of days required to complete the work is:
      A 10(6/7) Correct Answer Incorrect Answer
      B 12(6/7) Correct Answer Incorrect Answer
      C 12(1/7) Correct Answer Incorrect Answer
      D 10(1/7) Correct Answer Incorrect Answer

      Solution

      AB 2036 180(T.W) 95Efficiency Total days in complete work=180/9+5 =180/14. =12(12/14) =12(6/7)days.

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