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      Question

      A 240-litre solution contains milk and water in the ratio

      3:5 respectively. How much milk should be added to make the ratio of milk to water 7:10?
      A 13 Correct Answer Incorrect Answer
      B 15 Correct Answer Incorrect Answer
      C 10 Correct Answer Incorrect Answer
      D 12 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ;
      Initial quantity of milk = (3/8) × 240 = 90 litres

      Initial quantity of water = (5/8) × 240 = 150 litres

      Let the required quantity of milk to be added be 'y' litres.

      So, (90 + y) :150 = 7:10

      Or, 90 + y = 105

      Or, 'y' = 15

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