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      Question

      A can do a work in 6 days and B can do it in 12 days.

      They work together for 2 days. The remaining work is completed by A alone in:
      A 5 days Correct Answer Incorrect Answer
      B 3 days Correct Answer Incorrect Answer
      C 9 days Correct Answer Incorrect Answer
      D 17 days Correct Answer Incorrect Answer

      Solution

      ATQ, A's 1 day work = 1/6 B's 1 day work = 1/12 Together in 1 day: 1/6 + 1/12 = 2/12 + 1/12 = 1/4 In 2 days, work done = 1/2 Remaining work = 1/2 A alone takes: (1/2) / (1/6) = 3 days

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