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      Question

      A man is thrice as fast as a women and a woman is twice

      as fast as a boy. If all of them can do a work in 18 days. than a boy can do the work in?
      A 27 days Correct Answer Incorrect Answer
      B 162 days Correct Answer Incorrect Answer
      C 90 days Correct Answer Incorrect Answer
      D 54 days Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Ratio of efficiency of a man ,a woman and a boy = 6:2:1 So let total work =(6+2+1) x 18 = 162 So a boy alone will do it this work in = 162/1 = 162 days

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