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    Question

    A mixture contains 70 litres of milk and the rest water

    such that the ratio of the quantity of milk to that of water in the mixture is 7:3. How many litres of water should be added to the mixture such that milk constitutes 35% of the resultant mixture?
    A 200 litres Correct Answer Incorrect Answer
    B 1800 litres Correct Answer Incorrect Answer
    C 120 litres Correct Answer Incorrect Answer
    D 100 litres Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Total quantity of initial mixture = 70 × (10/7) = 100 litres Since the quantity of milk remains unchanged, therefore Total quantity of resultant mixture = (70/0.35) = 200 litres Therefore, the quantity of water added = 200 - 100 = 100 litres

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