Question

Два автомобиля идут навстречу друг другу из городов, расстояние между которыми 729 км. Первый автомобиль вышел на 3 часа раньше и шёл со скоростью 64 км/ч. Автомобили встретились через 4 часа после выхода второго поезда. С какой скоростью шёл второй автомобиль?

Answer 1

64*3=192
729-192=537
4(64+х)=537
256+4х=537
4х=537-256
4х=281
х=281/4
х=70,25

Answer 2

Problem Analysis

We are given two cars traveling towards each other from two different cities. The distance between the cities is 729 km. The first car started 3 hours earlier and traveled at a speed of 64 km/h. The cars met 4 hours after the second car started. We need to find the speed of the second car.

Solution

Let's break down the problem and find the solution step by step.

1. Calculate the distance traveled by the first car before the second car started. - The first car started 3 hours earlier and traveled at a speed of 64 km/h. - Therefore, the distance traveled by the first car before the second car started is 3 hours multiplied by the speed of the first car: 3 hours * 64 km/h = 192 km. (source:

2. Calculate the remaining distance between the two cars when they met. - The total distance between the cities is 729 km. - The distance traveled by the first car before the second car started is 192 km. - Therefore, the remaining distance between the two cars when they met is 729 km - 192 km = 537 km.

3. Calculate the time taken by the second car to cover the remaining distance. - The cars met 4 hours after the second car started. - Therefore, the time taken by the second car to cover the remaining distance is 4 hours.

4. Calculate the speed of the second car. - Speed = Distance / Time. - Therefore, the speed of the second car is 537 km / 4 hours = 134.25 km/h.

Answer

The second car was traveling at a speed of 134.25 km/h.