Question

    A solution of 960 ml has milk and water in 1:3 ratio. If an

    equal quantity of milk and water is added and the new ratio becomes 2:5, calculate the value of x.
    A 52 Correct Answer Incorrect Answer
    B 80 Correct Answer Incorrect Answer
    C 82 Correct Answer Incorrect Answer
    D 52 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Milk = (1/4) × 960 = 240 ml

    Water = 960 – 240 = 720 ml

    ATQ:

    (240 + x)/(720 + x) = 2/5

    ⇒ 5(240 + x) = 2(720 + x)

    ⇒ 1200 + 5x = 1440 + 2x

    ⇒ 3x = 240

    ⇒ x = 80

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