# Mixed 15 liters of 40% salt solution with 25 liters of 30% salt solution. What is the concentration of the resulting solution?

May 30, 2021 | education

| Find the volume of salt in each of the two solutions.

We multiply the indicated volume of the entire solution by the corresponding percentage of salt in it.

15 * 40% = 15 * 0.4 = 6 liters of salt (in 1 solution).

25 * 30% = 25 * 0.3 = 7.5 liters of salt (in solution 2).

Determine the total volume of the solution when mixed.

15 + 25 = 40 liters.

Find the total volume of salt in the resulting solution.

6 + 7.5 = 13.5 liters.

Find the concentration of salt in the resulting solution.

Divide the volume of salt by the total volume of the solution and multiply by 100%.

13.5 / 40 * 100% = 1350/40 = 33.75%.

Answer: 33.75%.

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