Question

Два поезда вышли одновременно навстречу друг другу из двух городов, расстояние между которымм 650 км, и встретились через 5 ч. Чему равна скорость второго поезда,если скорость первого - 62 км/ч?

Answer 1

650/5=130 (км/ч) - скорость сближения,130-62=68 (км/ч) - скорость второго поезда 
Ответ: скорость 2 поезда равна 68 км/ч

Answer 2

Problem Analysis

We are given that two trains start simultaneously from two cities and meet each other after 5 hours. The distance between the two cities is 650 km. We need to find the speed of the second train, given that the speed of the first train is 62 km/h.

Solution

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

To solve this problem, we can use the formula: Speed = Distance / Time.

The first train travels for 5 hours at a speed of 62 km/h, so the distance covered by the first train is: Distance = Speed * Time = 62 km/h * 5 h = 310 km.

The second train also travels for 5 hours, and the total distance covered by both trains is 650 km. Therefore, the distance covered by the second train is: Distance = Total Distance - Distance covered by the first train = 650 km - 310 km = 340 km.

Now, we can use the formula to find the speed of the second train: Speed = Distance / Time = 340 km / 5 h = 68 km/h.

Answer

The speed of the second train is 68 km/h.

Verification

Let's verify the answer using the given information.

The first train travels at a speed of 62 km/h for 5 hours, covering a distance of 310 km.

The second train travels at a speed of 68 km/h for 5 hours, covering a distance of 340 km.

The total distance covered by both trains is 310 km + 340 km = 650 km, which matches the given information.

Therefore, the answer is verified.