Thirty kilograms of solution A contains 80 percent water and 20 percent liquid M. if 50 percent water evaporates from this solution, what percentage in the new solution is liquid M?
Correct answer: D. 33.5%
- A. 10%
- B. 12%
- C. 13%
- D. 33.5%
Explanation
To solve this problem, first determine the initial composition of the solution: 30 kg of solution A contains 80% water and 20% liquid M. Therefore, there is 24 kg of water and 6 kg of liquid M. When 50% of the water evaporates, 12 kg of water remains, making the new solution total 18 kg (12 kg water + 6 kg liquid M). The percentage of liquid M in the new solution is calculated as (6 kg / 18 kg) × 100%, which equals 33.3%. Hence, the correct answer is 33.3%. The other options reflect incorrect calculations of this percentage.
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