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      Question

      A 50L solution has milk and water in 3:2 ratio. How much

      water must be added to make it 40% milk?
      A 18 litres Correct Answer Incorrect Answer
      B 25 litres Correct Answer Incorrect Answer
      C 28 litres Correct Answer Incorrect Answer
      D 12 litres Correct Answer Incorrect Answer

      Solution

      ATQ,

      Milk = 30L, water = 20L, let x = water added 30/(50+x) = 0.4 ⇒ 30 = 0.4(50+x) ⇒ 30 = 20+0.4x ⇒ x = 25L.

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