Question

Помогите пожалуйста.Автомобиль ехал 10 мин.и за каждую минуту проезжал 900 м. Потом сделал остановку,а потом ехал несколько минут,проезжая за каждую минуту 800 метров.Всего он проехал расстояние,равное 13 км. За сколько минут он проехал путь после остановки?

Answer 1

13км=13000м
900*10=9000 м - проехал автобус до остановки
13000-9000=4000 м - проехал автобус после остановки
4000:800=5 мин - ехал автобус после остановки
Ответ: 5 минут

Answer 2

Problem Analysis

We are given the information that a car traveled for 10 minutes and covered a distance of 900 meters per minute. After making a stop, the car continued to travel for several minutes, covering a distance of 800 meters per minute. The total distance traveled by the car is 13 kilometers. We need to determine the duration of the second part of the journey, after the stop.

Solution

To solve this problem, we can break it down into two parts: the distance covered before the stop and the distance covered after the stop.

Let's calculate the distance covered before the stop: - The car traveled for 10 minutes at a speed of 900 meters per minute. - Therefore, the distance covered before the stop is 10 minutes * 900 meters per minute = 9000 meters.

Now, let's calculate the distance covered after the stop: - The total distance traveled by the car is 13 kilometers, which is equal to 13,000 meters. - The distance covered before the stop is 9000 meters. - Therefore, the distance covered after the stop is 13,000 meters - 9000 meters = 4000 meters.

To find the duration of the second part of the journey, we can divide the distance covered after the stop by the speed of the car after the stop: - The car covered a distance of 4000 meters after the stop. - The speed of the car after the stop is 800 meters per minute. - Therefore, the duration of the second part of the journey is 4000 meters / 800 meters per minute = 5 minutes.

Answer

The car traveled for 5 minutes after the stop.