Quantitative - Mathematics - Word Problems:

Mixture

MCQ - 398-13165

Question:

A pound of water is evaporated from 6 pounds of seawater containing 4% salt. The percentage of salt in the remaining solution is

3.6%
4%
4.8%
4%
6%

Correct Answer: C

Explanation:

A pound of water is evaporated from 6 pounds of seawater containing 4% salt. The percentage of salt in the remaining solution is

Salt in 6 pounds of water = 6 × $\frac{4}{100}$ = 0.24

1 pound of water evaporated, so the remaining water = 5 pound ---- salt does not change.

Percentage of 0.24gm salt in 5 pounds of water = $\frac{0.24}{5}$ × 100 = 4.8

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