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      Question

      In a 240-litre mixture of milk and water, the amount of

      milk is 50% more than the amount of water. How much milk should be added so that the ratio of milk to water becomes 7:4?
      A 48 Correct Answer Incorrect Answer
      B 75 Correct Answer Incorrect Answer
      C 24 Correct Answer Incorrect Answer
      D 32 Correct Answer Incorrect Answer
      E 40 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the initial quantity of water be 'b' litres. Initial quantity of milk = '1.5b' litres. So, b + 1.5b = 240 Or, 2.5b = 240 Or, b = 96 Initial quantity of water = 96 litres Initial quantity of milk = 1.5 × 96 = 144 litres Let the required quantity be 'x' litres. So, (144 + x) : 96 = 7 : 4 Or,144 + x = 168 Or, x = 24

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