Question

1 До высушивания арбуз массой 15 кг имел 80% воды по массе, после высушивания содержание воды по массе уменьшилось до 60%. Определите массу арбуза после высушивания.

Answer 1

Составим пропорцию:

$\frac{15}{80} = \frac{x}{60} = > x = \frac{15 \times 60}{80} = > x = \frac{900}{80} = 11 \frac{20}{80} = 11 \frac{1}{4}$

Килограммов

Answer 2

Calculation of the Mass of the Watermelon after Drying

To determine the mass of the watermelon after drying, we need to calculate the mass of water that was removed during the drying process.

Given: - Initial mass of the watermelon = 15 kg - Initial water content by mass = 80% - Final water content by mass after drying = 60%

To calculate the mass of water removed, we can use the following formula:

Mass of water removed = Initial mass of the watermelon * (Initial water content - Final water content)

Substituting the given values into the formula:

Mass of water removed = 15 kg * (80% - 60%) = 15 kg * 20% = 3 kg

Therefore, the mass of the watermelon after drying can be calculated by subtracting the mass of water removed from the initial mass of the watermelon:

Mass of the watermelon after drying = Initial mass of the watermelon - Mass of water removed

Mass of the watermelon after drying = 15 kg - 3 kg = 12 kg

Therefore, the mass of the watermelon after drying is 12 kg.