Question

Из двух городов расстояние между которыми 580 км вышли одновременно навстречу друг другу 2 поезда и встретились через 3 ч. скорость 1 поезда 65 км\ч. Найти скорость 2 поезда

Answer 1

Найдем расстояние которое проехал первый поезд:
65*3=195км
Найдем расстояние которое проехал второй поезд:
580-195=385км
Найдем скорость второго поезда:
385/3=128,3км/ч

Answer 2

Problem Analysis

We are given that two trains start simultaneously from two cities that are 580 km apart and are moving towards each other. The first train has a speed of 65 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.

We can use the formula distance = speed × time to solve this problem.

The first train travels for 3 hours, so the distance it covers is 65 × 3 = 195 km.

The second train also travels for 3 hours, so the distance it covers is x × 3 = 3x km.

Since the total distance between the two trains is 580 km, we can write the equation:

195 + 3x = 580

Simplifying the equation, we get:

3x = 580 - 195

3x = 385

Dividing both sides of the equation by 3, we find:

x = 385 / 3

Now, let's calculate the value of x:

x ≈ 128.33 km/h

Therefore, the speed of the second train is approximately 128.33 km/h.

Answer

The speed of the second train is approximately 128.33 km/h.