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    Question

    A mixture contains oil and water in the ratio 7:5. When

    70% of this mixture is replaced with 153 litres of water, the ratio becomes 8: 13. Than, what will be  the quantity of original mixture?
    A 900 litres Correct Answer Incorrect Answer
    B 960 litres Correct Answer Incorrect Answer
    C 945 litres Correct Answer Incorrect Answer
    D 960 litres Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    Ratio of oil and water = 7 : 5 (Initially) Ratio of oil and water = 8 : 13 (After adding 153 litres water)  Equating oil from the mixture:-  Ratio of oil and water = 56 : 40 (Initially)  Ratio of oil and water = 56 : 91 (After adding water)  51 units = 153 litres 1 units = 3 litres  Initially quantity of mixture = 96 x 3 = 288  30% -- 288 litres  therefore, orginal mixture will be = 100 % --- 960 litres

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