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    Question

    A mixture (acetone and water) contains 40% acetone and

    rest 96 litres water. How much acetone should be added to the mixture to make the ratio of acetone to water in the mixture 5:6?
    A 16 litres Correct Answer Incorrect Answer
    B 10 litres Correct Answer Incorrect Answer
    C 14 litres Correct Answer Incorrect Answer
    D 13 litres Correct Answer Incorrect Answer
    E 18 litres Correct Answer Incorrect Answer

    Solution

    Initial quantity of acetone in the mixture = 96 × (0.4/0.6) = 64 litres
    Let the quantity of acetone added be ‘x’ litres
    According to the question,
    (64 + x)/96 = 5/6
    => x = 80 – 64 = 16
    Therefore, quantity of acetone added = 16 litres

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