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      Question

      Mixture ‘A’ contains 70% acetone and rest 30 litres

      water. Mixture ‘B’ contains 40 litres acetone and rest 50% water. When two mixtures are mixed, then find the ratio of acetone to water in the resultant mixture.
      A 11:7 Correct Answer Incorrect Answer
      B 10:7 Correct Answer Incorrect Answer
      C 11:9 Correct Answer Incorrect Answer
      D 15:7 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Quantity of water in mixture ‘A’ = 30 litres Total quantity of mixture ‘A’ = 30/0.3 = 100 litres Therefore, quantity of acetone in mixture ‘A’ = 100 – 30 = 70 litres Quantity of acetone in mixture ‘B’ = 40 litres Total quantity of mixture ‘B’ = 40/0.50 = 80 litres Quantity of water in mixture ‘B’ = 80 – 40 = 40 litres Therefore, quantity of acetone in resultant mixture = 70 + 40 = 110 litres Quantity of water in resultant mixture = 30 + 40 = 70 litres Required ratio = 110:70 = 11:7

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