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    Question

    If 50 L of milk solution has 40 % milk in it , then how

    much milk should be added to make it 60 % in the solution ?
    A 25 litres Correct Answer Incorrect Answer
    B 22.8 litres Correct Answer Incorrect Answer
    C 22.5 litres Correct Answer Incorrect Answer
    D 19.8 litres Correct Answer Incorrect Answer

    Solution

    Total solution = 50 L Milk = 40% of 50 = 20 L Let x L of pure milk be added. Then, milk = 20 + x New total = 50 + x (20 + x)/(50 + x) = 3/5 x = 25 Hence, 25 liters of milk should be added.

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