Question

Помогите с задачей Во время медосмотра друзья Алеша, Борис и Ваня подсчитали , что их средний рост равен 142 см. Ваня выше Алеши на 5 см и выше Бориса на 7 см. Каков рост каждого?

Answer 1

Ваня 154.Борис 149 а алеша 147

Answer 2

Solving the Problem of Average Height

To solve this problem, we can use a system of equations to represent the given information and then solve for the heights of Alesha, Boris, and Vanya.

Let's denote: - Alesha's height as A - Boris's height as B - Vanya's height as V

We are given the following information: 1. The average height of Alesha, Boris, and Vanya is 142 cm. 2. Vanya is 5 cm taller than Alesha. 3. Vanya is 7 cm taller than Boris.

We can represent this information in the form of equations and solve for the heights of Alesha, Boris, and Vanya.

Formulating the Equations

We can create the following equations based on the given information: 1. A + B + V = 3 * 142 (as the average height of the three is 142 cm) 2. V = A + 5 (Vanya is 5 cm taller than Alesha) 3. V = B + 7 (Vanya is 7 cm taller than Boris)

Solving the Equations

We can use the second and third equations to express Alesha's and Boris's heights in terms of Vanya's height and then substitute these expressions into the first equation to solve for Vanya's height.

Let's proceed with solving the equations to find the heights of Alesha, Boris, and Vanya.