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      Question

      A 60-litre mixture of milk and water is in the ratio

      3:2. How much water should be added to make water 70% of the new mixture?
      A 40 litres Correct Answer Incorrect Answer
      B 45 litres Correct Answer Incorrect Answer
      C 50 litres Correct Answer Incorrect Answer
      D 60 litres Correct Answer Incorrect Answer

      Solution

      70% water means 30% milk.
      Current quantity of milk = 60 ├Ч 3/5 = 36 litres
      New mixture = 36 ├╖ 0.3 = 120 litres
      Water in new mixture = 120 тАУ 36 = 84 litres
      Water in old mixture = 60 тАУ 36 = 24 litres
      Water to be added = 84 тАУ 24 = 60 litres

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