Question

До 8 кг 60 відсоткового розчину солі долили 4 кг води.Яким після цього став відсотковий вміст солі в розчині?

Answer 1

В 8 кг розчину (раствора) было 60% соли, то есть 8*0,6 = 4,8 кг.
Долили 4 кг воды. Стало те же 4,8 кг соли на 8 + 4 = 12 кг розчину.
4,8/12*100% = 40%

Answer 2

Calculating the Percentage of Salt in the Solution

To calculate the new percentage of salt in the solution after adding 4 kg of water to 8 kg of 60% salt solution, we can use the following approach:

1. Calculate the Total Weight of the Solution: - The total weight of the solution after adding 4 kg of water to the 8 kg of 60% salt solution is 8 kg (salt solution) + 4 kg (water) = 12 kg.

2. Calculate the Total Amount of Salt in the Solution: - The total amount of salt in the solution remains the same at 60% of the original 8 kg salt solution.

3. Calculate the New Percentage of Salt in the Solution: - Divide the total amount of salt by the total weight of the solution and multiply by 100 to get the new percentage of salt in the solution.

Calculation

- Total Weight of the Solution: 12 kg - Total Amount of Salt in the Solution: 60% of 8 kg = 4.8 kg - New Percentage of Salt in the Solution: (4.8 kg / 12 kg) * 100 = 40%

The new percentage of salt in the solution after adding 4 kg of water is 40%.