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      Question

      A is twice as efficient as B and can finish a piece of

      work in 22 days less than B. B can finish this work in how many days?
      A 40 days Correct Answer Incorrect Answer
      B 48 days Correct Answer Incorrect Answer
      C 44 days Correct Answer Incorrect Answer
      D 45 days Correct Answer Incorrect Answer

      Solution

      Ratio of efficiency of A and B = 2: 1
      A will take 1/2 of time as compared to B.
      Say, B takes 2x days and A takes x days.
      ∴ 2x – x = 22 ⇒ x = 22
      ∴ B takes 22 × 2 = 44 days to do the work.

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