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    Question

    A 210 litres mixture contains only water and phenyl in

    the ratio 3:4, respectively. If 70 litres of this mixture is replaced with 25 litres of alcohol, then what will be the ratio of quantity of water to that of alcohol in the resultant mixture?
    A 11:5 Correct Answer Incorrect Answer
    B 12:7 Correct Answer Incorrect Answer
    C 12:5 Correct Answer Incorrect Answer
    D 8:5 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Initial quantity of water in the mixture = 210 × (3/7) = 90 litres After removing 70 litres of the mixture, quantity of water = (210 – 70) × (3/7) = 140 × (3/7) = 60 litres Therefore required ratio = 60:25 = 12:5

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