Question

От двух станций которые находятся на расстояний 652 км вышли одновременно на встречу друг другу два поезда встретились через 4 часа. скорость одного поезда 85 км С какой скоростью шёл другой поезд Помогите решить задачу с вопросами

Answer 1

1) 652 : 4= 163 (км/ч)- скорость сближения
2) 163-85= 78 (км/ч)
Ответ : скорость второго поезда равна 78 км/ч.

Answer 2

Problem Analysis

We have two trains that start from two different stations simultaneously and travel towards each other. The distance between the stations is 652 km. After 4 hours, the trains meet each other. We need to find the speed of the second train, given that the speed of the first train is 85 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: distance = speed × time.

The distance traveled by the first train in 4 hours is 85 km/h × 4 h = 340 km.

Since the two trains meet each other, the sum of the distances traveled by both trains should be equal to the total distance between the stations.

So, the distance traveled by the second train in 4 hours is 652 km - 340 km = 312 km.

Now, we can use the formula distance = speed × time for the second train:

312 km = x km/h × 4 h.

To find the value of x, we can rearrange the equation:

x km/h = 312 km / 4 h.

Calculation

Let's calculate the speed of the second train:

x km/h = 312 km / 4 h = 78 km/h.

Therefore, the speed of the second train is 78 km/h.

Answer

The second train was traveling at a speed of 78 km/h.

Note: The sources provided do not contain relevant information for this specific problem.