When one litre of water is added to a mixture of acid and water, the new mixture contains 20% acid. When one litre of acid is added to the new mixture, then the resulting mixture contains $33\frac{1}{3}$% acid. The percentage of acid in the original mixture was

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INSURANCE EXAMS (New India Assurance) 2011 click here to view all questions

When one litre of water is added to a mixture of acid and water, the new mixture contains 20% acid. When one litre of acid is added to the new mixture, then the resulting mixture contains $33\frac{1}{3}$% acid. The percentage of acid in the original mixture was

A20 %

B22 %

C24 %

D25 %

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Correct answer is: 25 % Explanation: If there be 1 litre of acid in 4 litres of mixture, then in case 1, Percentage of acid $= \frac{1}{4+1} \times 100 = 20 \text{%}$ Case ll. Percentage of acid $= \frac{2}{6} \times 100 = \frac{100}{3}=33\frac{1}{3}\text{%}$ Therefore, Percentage of acid in original 1 mixture = $= \frac{1}{4} \times 100$ $= 25 \text{%}$   Nithin ? answered undefined All Comments

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