Question

Масса 15 одинаковых деталей составила 37,5 кг. Какова масса 12 таких деталей?

Answer 1

15 дет. - 37,5 кг

12 дет. - х кг

Решим пропорцией.

15х=37,5*12

15х=450

х=450/15

х=30 кг.

Ответ: 30 кг

Answer 2

To find the mass of 12 identical parts, we can use the concept of proportionality. If the mass of 15 identical parts is 37.5 kg, we can set up a proportion to find the mass of 12 parts.

Let's call the mass of 12 identical parts "x" kg. The proportion can be set up as follows:

(15 parts mass) / (12 parts mass) = (37.5 kg) / (x kg)

Now, we can solve for "x":

(15 / 12) = (37.5 / x)

Cross-multiply:

15 * x = 12 * 37.5

Now, divide both sides by 15:

x = (12 * 37.5) / 15

x = 450 / 15

x = 30

So, the mass of 12 identical parts is 30 kg.