Multiple choice

Two litres of water evaporates from 6 litres of a solution containing 10% salt. Find the percentage of salt in the remaining solution.

  1. 12%

  2. 13%

  3. 14%

  4. 15%

  5. 10%
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D Correct answer
Explanation

Initial salt = 10% of 6L = 0.6L. Total volume after evaporation = 6 - 2 = 4L. Salt percentage = (0.6 / 4) * 100 = 15%.

AI explanation

In the original 6 litres of solution, 10 percent is salt, which equals 0.60 litres of salt. Since only water evaporates, the amount of salt remains 0.60 litres in the remaining 4 litres of solution. The new percentage of salt is (0.60 / 4) * 100, which equals 15 percent.

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