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    Question

    600 ml of mixture contains milk and water in the ratio

    of 3:2. If `x` ml of milk and `(x - 40)` ml of water are added, then the ratio becomes 7:5. Find the value of `x`.
    A 160 Correct Answer Incorrect Answer
    B 180 Correct Answer Incorrect Answer
    C 200 Correct Answer Incorrect Answer
    D 220 Correct Answer Incorrect Answer

    Solution

    Milk = (3/5) × 600 = 360 ml
    Water = (2/5) × 600 = 240 ml
    (360 + x)/(240 + x - 40) = 7/5
    5(360 + x) = 7(200 + x)
    1800 + 5x = 1400 + 7x
    2x = 400
    ⇒ x = 200

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