Question

Две подруги одновременно вышли из своих домов,расстояние между которыми 2600м.,и пошли по одной и тойже дороге на встречу друг другу.Скорость одной девочки 70м.в минуту ,а другой на 10 м.меньше.Через сколько минут они встретятся?

Answer 1

1) 70-10=60 (м\мин)
2) 70+60=130 (м\мин)
3) 2600:130=20 (мин)

Answer 2

1)70-10=60(мин) 2)70+60=130(м) 3)2600:130=20(мин)

Answer 3

Problem Analysis

Two friends start from their homes and walk towards each other on the same road. The distance between their homes is 2600 meters. One friend walks at a speed of 70 meters per minute, while the other friend walks at a speed 10 meters less than that. We need to calculate how many minutes it will take for them to meet.

Solution

To find the time it takes for the two friends to meet, we can use the formula: time = distance / relative speed.

Let's calculate the relative speed of the two friends first. The speed of the first friend is given as 70 meters per minute, and the speed of the second friend is 10 meters less than that. Therefore, the speed of the second friend is 70 - 10 = 60 meters per minute.

Now, we can calculate the time it takes for them to meet by dividing the distance between their homes (2600 meters) by their relative speed (70 + 60 = 130 meters per minute).

Calculation

Relative speed = 70 + 60 = 130 meters per minute

Time = Distance / Relative speed = 2600 / 130 = 20 minutes

Answer

It will take them 20 minutes to meet.