To 1.5 kg of a 10% salt solution was added 2.5 kg of a 16% solution. How much salt did you get in the solution?

Let’s calculate the mass of salt in the first solution. To do this, let’s make a proportion:

1.5 kg – 100%,

x kg – 10%.

x kg = 1.5 * 10: 100 = 0.15 kg.

Let’s calculate the mass of salt in the second solution:

2.5 kg – 100%,

x kg – 16%.

x = 2.5 * 16: 100 = 0.4 kg.

Let’s calculate the mass of the entire resulting solution:

1.5 + 2.5 = 4 kg.

Let’s calculate the mass of salt in the resulting solution:

0.15 + 0.4 = 0.55 kg.

Let’s calculate the percentage of salt in the resulting solution:

4 kg – 100%,

0.55 kg – x%.

x = 0.55 * 100: 4 = 13.75%.

Answer: in a solution of 13.75% salt.