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    Question

    A mixture contains 90 litres milk and rest is water.

    When 30 litres milk and 18 litres water is added to the mixture, the ratio of milk to water becomes 4 : 3. Find the initial quantity of mixture.
    A 150 litres Correct Answer Incorrect Answer
    B 162 litres Correct Answer Incorrect Answer
    C 168 litres Correct Answer Incorrect Answer
    D 174 litres Correct Answer Incorrect Answer
    E 180 litres Correct Answer Incorrect Answer

    Solution

    Let initial quantity of water be ‘n’ litres. So,
    (90 + 30) : (n + 18) = 4 : 3 Or,
    120 : (n + 18) = 4 : 3 Or,
    n + 18 = 90 Or,
    n = 72 Therefore, required quantity of mixture
    = 90 + 72
    = 162 litres

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