Question

Масса 3 дм кубе маса равна 1 3/7 кг найдите масса 2 3 8 дм куб маса

Answer 1

Ответ:

Пошаговое объяснение:

1). 1 3/7: 3  =10/7*1/3=10/21 кг - масса 1 куб. см

2). 2/3/8*10/21=19/8*10/7=190/168=95/84=1 11/84 кг -масса 2 3/8 куб. дм

Answer 2

To find the mass of a 2.38 dm³ cube given that the mass of a 3 dm³ cube is 1 3/7 kg, we can set up a proportion to solve for the unknown mass.

Let's denote the mass of the 2.38 dm³ cube as M. We can set up the following proportion:

(3 dm³) / (1 3/7 kg) = (2.38 dm³) / M

First, let's convert 1 3/7 kg to an improper fraction. 1 3/7 is equal to (7/7 + 3/7) kg, which is equal to 10/7 kg.

Now, we can substitute the values into the proportion:

(3 dm³) / (10/7 kg) = (2.38 dm³) / M

To solve for M, we can cross-multiply and then divide:

3 dm³ * M = (2.38 dm³) * (10/7 kg)

M = [(2.38 dm³) * (10/7 kg)] / 3 dm³

Now, we can calculate the mass M:

M = (2.38 * 10 * 1 kg) / (7 * 3)

M = 0.6785714285714286 kg

Therefore, the mass of the 2.38 dm³ cube is approximately 0.6786 kg.