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      Question

      If 20 men or 12 boys can complete a job in 25 days, how

      long will it take for a team of 15 men and 18 boys to complete the same job? (Calculate approximate value)
      A 21 days Correct Answer Incorrect Answer
      B 18 days Correct Answer Incorrect Answer
      C 32 days Correct Answer Incorrect Answer
      D 11 days Correct Answer Incorrect Answer

      Solution

      According to the question,

      20M = 12B

      Or, 5M = 3B

      Therefore, (15M + 18B) = (9B + 18B) = 27B

      12 boys take 25 days to complete the work

      Therefore, time taken by 27 boys to complete the work = (12 ร— 25) / 27 = 11.11 days or 11 days

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