Question

Бочка на 3/4 заполнена медным купоросом .На обработку винограда крестьянин использовал 2/5 части купороса. Какую часть бочки занимает оставшийся медный купорос?

Answer 1

Ответ:

$\frac{9}{20}$

Пошаговое объяснение:

$\frac{3}{4}*\frac{5-2}{5}$=$\frac{3}{4}*\frac{3}{5}=\frac{9}{20}$

Answer 2

Calculation of the Remaining Copper Sulfate in the Barrel

To determine the portion of the barrel occupied by the remaining copper sulfate, we need to calculate the difference between the initial amount of copper sulfate and the amount used for grape processing.

Given the information provided: - The barrel is filled to 3/4 of its capacity with copper sulfate. - The peasant used 2/5 of the copper sulfate for grape processing.

To find the remaining copper sulfate, we need to subtract the amount used for grape processing from the initial amount in the barrel.

Let's calculate it step by step:

1. Convert the fractions to a common denominator: - 3/4 = 15/20 - 2/5 = 8/20

2. Subtract the amount used for grape processing from the initial amount in the barrel: - 15/20 - 8/20 = 7/20

Therefore, the remaining copper sulfate in the barrel occupies 7/20 of the barrel's capacity.