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    Question

    A mixture contains 45 ml water and rest β€˜x’ ml milk.

    When 0.3x ml of water is added, the water becomes 3/7th of the mixture. Find the value of β€˜x’.
    A 80 Correct Answer Incorrect Answer
    B 120 Correct Answer Incorrect Answer
    C 150 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    According to the question,
    Quantity of water after addition of 0.3x ml water = (45 + 0.3x)
    Total quantity of the mixture = 45 + 0.3x + x = (45 + 1.3x)
    Therefore,
    (3/7)(45 + 1.3x) = (45 + 0.3x)
    Or, 135 + 3.9x = 315 + 2.1x
    Or, 1.8x = 180
    Or, x = 100

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