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    Question

    A 30-litre mixture of acid and water contains 33(1/3)%

    acid. How much water (in litres) must be added to get a mixture having 25% acid?
    A 8.75 Correct Answer Incorrect Answer
    B 10.5 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 11 Correct Answer Incorrect Answer

    Solution

    Total mixture = 30 liters Acid = 1/3 × 30 = 10 liters Water = 20 ATQ; 10/(30 + x) = 1/4 40 = 30 + x x = 10 liter

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