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    Question

    A mixture contains milk and water in the ratio 7:5. If 20

    litres of water is added, the ratio changes to 7:6. What is the final amount of the mixture?
    A 200 litres Correct Answer Incorrect Answer
    B 260 litres Correct Answer Incorrect Answer
    C 360 litres Correct Answer Incorrect Answer
    D 250 litres Correct Answer Incorrect Answer

    Solution

    ATQ,

    Milk : Water = 7:5 тЖТ Total = 12 parts

    Let total = 12x

    тЖТ Milk = 7x, Water = 5x

    Add 20 litres of water тЖТ Water = 5x + 20

    тЖТ New ratio = 7x : (5x + 20) = 7 : 6

    Image

    Original = 12 ├Ч 20 = 240 litres

    Final = 240 + 20 = 260 litres

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