Question

Из двух городов, расстояние между которыми 789 км одновременно навстречу друг другу вышли два поезда. Скорость первого поезда 62 км.ч Через 6 часов расстояние между поездами было равно 75 км.ч С какой скоростью шёл второй поезд?

Answer 1

62*6=372 км проехал первый
789-372=417 км
417-75=342 км проехал второй
342/6=57 км в час скорость второго

Answer 2

789-(62*6+Х*6)=75
789-372-6Х=75
342=6х
х=57
57км/ч

Answer 3

Problem Analysis

We are given that two trains start simultaneously from two cities that are 789 km apart and are moving towards each other. The speed of the first train is 62 km/h. After 6 hours, the distance between the trains is 75 km/h. We need to find the speed of the second train.

Solution

Let's assume the speed of the second train is x km/h.

The first train travels for 6 hours at a speed of 62 km/h, so the distance covered by the first train is 6 * 62 = 372 km.

The remaining distance between the two trains after 6 hours is 789 - 372 = 417 km.

Since the total distance between the two trains is decreasing at a rate of 75 km/h, we can set up the following equation:

Distance = Speed * Time

417 = (62 + x) * 6

Simplifying the equation:

417 = 372 + 6x

45 = 6x

x = 45/6

x = 7.5 km/h

Therefore, the speed of the second train is 7.5 km/h.

Answer

The second train is moving at a speed of 7.5 km/h.