Question

Из двух школ , расстояния между которыми 1350м вышли одновременно две девочки навстречу друг другу.одна шла со скоростью 70м/м найди скорость другой девочки если они встретились через 9 мин

Answer 1

1)70*9=630(м)-прошла первая девочка
2)1350-630=720(м)-прошла вторая девочка
3)720:9=80(м/мин)-скорость второй девочки
Ответ:80м/мин

Answer 2

80м/М скорость другой девочки

Answer 3

Problem Analysis

We are given two schools that are 1350 meters apart. Two girls start walking towards each other from these schools at the same time. We know the speed of one girl is 70 m/min. We need to find the speed of the other girl if they meet after 9 minutes.

Solution

Let's assume the speed of the second girl is x m/min. Since they are walking towards each other, their combined speed is the sum of their individual speeds.

The total distance they need to cover is 1350 meters. The time taken to cover this distance is 9 minutes.

Using the formula distance = speed × time, we can set up the following equation:

70 m/min + x m/min = 1350 m / 9 min

Simplifying the equation, we get:

70 + x = 150

Now, we can solve for x:

x = 150 - 70

x = 80

Therefore, the speed of the second girl is 80 m/min.

Answer

The speed of the second girl is 80 m/min.