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    Question

    The ratio of milk to water in a mixture is 10:3. 39

    litres of mixture is taken out and 9 litres of water is added in the remaining mixture. If now the milk becomes twice the water, find the initial quantity of water.
    A 12.5 litres Correct Answer Incorrect Answer
    B 22.5 litres Correct Answer Incorrect Answer
    C 28.5 litres Correct Answer Incorrect Answer
    D 18.5 litres Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let milk = 10x litres Water = 3x litres Milk in 39 litres of mixture = (39/13) ├Ч 10 = 30 litres Water in 39 litres of mixture = (39/13) ├Ч 3 = 9 litres According to the question, (10x тАУ 30) = 2 ├Ч (3x тАУ 9 + 9) 10x тАУ 30 = 6x 4x = 30 x = 7.5 Water in the initial mixture = 3 ├Ч 7.5 = 22.5 litres

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