Question

для ремонта школы привезли 475 штук одинаковых по массе красных кирпичей и 425 штук таких же по массе белых кирпичей.Масса всех кирпичей 3600 кг.найди массу красных и белых кирпичей в отдельности

Answer 1

475+425=900 штук (общее кол-во кирпичей)
 900шт - 3600кг
 475шт - х кг

х=(475*3600)/900=1900кг (масса красных кирпичей)

3600кг-1900кг=1700кг (белые)

Answer 2

Problem Analysis

To find the mass of the red and white bricks separately, we need to set up a system of equations based on the given information. Let's denote the mass of one red brick as x kg and the mass of one white brick as y kg. We know that the total mass of all the bricks is 3600 kg, and we have 475 red bricks and 425 white bricks.

System of Equations

We can set up the following system of equations to represent the given information:

Equation 1: 475x + 425y = 3600 (total mass equation) Equation 2: x = y (both types of bricks have the same mass)

Solution

To solve this system of equations, we can substitute the value of x from Equation 2 into Equation 1:

475(y) + 425y = 3600

Simplifying the equation:

900y = 3600

Dividing both sides by 900:

y = 4

Since x = y, the mass of the red bricks is also 4 kg.

Therefore, the mass of the red bricks is 4 kg and the mass of the white bricks is 4 kg.

Answer

The mass of the red bricks is 4 kg and the mass of the white bricks is also 4 kg.