Question

    A container holds 336 ml of a solution of juice and

    water, mixed in the ratio 7:5. How much water must be added to this solution so that the ratio of juice to water becomes 7:6?
    A 28 ml Correct Answer Incorrect Answer
    B 20 ml Correct Answer Incorrect Answer
    C 18 ml Correct Answer Incorrect Answer
    D 32 ml Correct Answer Incorrect Answer

    Solution

    ATQ,

    Initial quantity of juice = (7/12) × 336 = 196 ml Initial quantity of water = 336 - 196 = 140 ml Let the quantity of water added = x ml ATQ, 196 / (140 + x) = 7 / 6 ⇒ 140 + x = (196 × 6) / 7 = 168 ⇒ x = 168 - 140 = 28 ml

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