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      Question

      A is twice as good a workman as B and together they

      finish a piece of work in 14 days. The number of days taken by A alone to finish the work is 
      A 11 days Correct Answer Incorrect Answer
      B 21 days Correct Answer Incorrect Answer
      C 28 days Correct Answer Incorrect Answer
      D 42 days Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let daily work done of A =2units & Daily work done of B =1units So (A+B)’s 1 day work = 2+1 = 3units;                      Total work done by A & B in 14 days = 14×3 =42 units     So A alone can complete job in  = 42/2 = 21 days

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