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      Question

      A mixture contains 100 litres milk and rest is water.

      When 50 litres milk and 30 litres water is added to the mixture, the ratio of milk to water becomes 5 : 4. Find the initial quantity of mixture
      A 180 litres Correct Answer Incorrect Answer
      B 190 litres Correct Answer Incorrect Answer
      C 200 litres Correct Answer Incorrect Answer
      D 210 litres Correct Answer Incorrect Answer
      E 220 litres Correct Answer Incorrect Answer

      Solution

      Let initial quantity of water be тАШnтАЩ litres. So,
      (100 + 50) : (n + 30) = 5 : 4 Or,
      150 : (n + 30) = 5 : 4 Or,
      n + 30 = 120 Or,
      n = 90 Therefore, required quantity of mixture
      = 100 + 90
      = 190 litres

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