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    Question

    The ratio of quantity of milk and water in a 400 litres

    mixture is 7:3, respectively. On removing 'M' litres of mixture the difference between the quantities of milk and water becomes 70 litres. Find the value of 'M'.
    A 142 Correct Answer Incorrect Answer
    B 270 Correct Answer Incorrect Answer
    C 250 Correct Answer Incorrect Answer
    D 225 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, After removing 'M' litres of mixture, let quantity of milk and water left be 7x litres and 3x litres, respectively. According to the question, 7x - 3x = 70 Or, 4x = 70 Or, 'x' = 70 / 4 = 17.5 Therefore, after removal of 'M' litres of mixture, quantity of mixture left = 7x + 3x = 10x = 10 * 17.5 = 175 litres Therefore, 'M' = 400 - 175 = 225

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