Question

Для ремонта школы купили 20 банок с белой краской и несколько таких же банок с красной краской. Масс всех банок с белой краской равна 60 кг, а с красной - 120 кг. Сколько банок с красной краской купили?

Answer 1

20бб-60кг
?бк-120кг
Решение:
(20×120)÷60=2400÷60=40

Answer 2

Answer in detail. For the school renovation, they bought 20 cans of white paint and several cans of the same size with red paint. The mass of all cans of white paint is 60 kg, and of red paint - 120 kg. How many cans of red paint did they buy?

To solve this problem, we need to find the mass of one can of paint and then divide the mass of red paint by that. We can use the following steps:

- Step 1: Let x be the mass of one can of paint in kilograms. Then the mass of 20 cans of white paint is 20x, and the mass of y cans of red paint is yx. - Step 2: We are given that the mass of all cans of white paint is 60 kg, and the mass of all cans of red paint is 120 kg. We can write two equations using these information:

$$20x = 60$$ $$yx = 120$$

- Step 3: We can solve for x by dividing both sides of the first equation by 20:

$$x = \frac{60}{20}$$ $$x = 3$$

- Step 4: We can substitute x = 3 into the second equation and solve for y:

$$y(3) = 120$$ $$y = \frac{120}{3}$$ $$y = 40$$

- Step 5: We can conclude that they bought 40 cans of red paint for the school renovation.