Question

После того, как из раствора сахара массой 300 граммов выпарили 100 граммов воды, содержание сахара в растворе стало 3%. Сколько процентов сахара содержалось первоначально в растворе?

Answer 1

300-100=200г масса нового раствора
200*3/100 =6г сахара в новом растворе
6/300*100=2%

Answer 2

Calculation of Initial Sugar Content in the Solution

To calculate the initial sugar content in the solution, we can use the information provided. Initially, there was a solution with a mass of 300 grams, and after evaporating 100 grams of water, the remaining solution had a sugar content of 3%.

Let's assume that the initial sugar content in the solution was x%.

According to the given information, the mass of the solution after evaporation is 300 grams - 100 grams = 200 grams.

Using the concept of mass percentage, we can set up the following equation:

(x/100) * 200 = 3

Simplifying the equation, we have:

2x = 3

Solving for x, we find:

x = 3/2 = 1.5

Therefore, the initial sugar content in the solution was 1.5%.

Conclusion

The initial sugar content in the solution was 1.5%.