Question

Брат и сестра одновременно вышли из дома и пошли по улице в противоположных направлениях сестра с Шла со скоростью 70 м минуту а скорость брата была на 10 метров минуту больше Какое расстояние будет между ними через 20 минут

Answer 1

1)(70+10)+70=150(м/мин)скорость удаления
2)150*20=3000м=3(км)
Ответ:3 км будет расстояние между ними через 20 мин

Answer 2

Problem Analysis

We are given that a brother and sister leave their house at the same time and walk in opposite directions. The sister walks at a speed of 70 m/minute, while the brother walks at a speed 10 m/minute faster than the sister. We need to find the distance between them after 20 minutes.

Solution

To find the distance between the brother and sister after 20 minutes, we first need to calculate the distance each of them covers in 20 minutes.

Let's start with the sister. We know that she walks at a speed of 70 m/minute. Therefore, in 20 minutes, she would cover a distance of 70 m/minute * 20 minutes = 1400 meters.

Now let's calculate the brother's distance. We are given that the brother's speed is 10 m/minute faster than the sister's speed. So his speed would be 70 m/minute + 10 m/minute = 80 m/minute.