Question

Из двух городов,расстояние между которыми 500км, вышли одновременно навстречу друг другу 2 поезда. Скорость одного поезда 45 км/ч. Определить скорость второго поезда, если поезда встретились через 5 часов.

Answer 1

1) 45×5=225 2)500-225=385 3) 385:5 =77 км

Answer 2

Problem Analysis

We have two trains traveling towards each other from two cities that are 500 km apart. The first train has a speed of 45 km/h. We need to determine the speed of the second train if the trains meet after 5 hours.

Solution

To solve this problem, we can use the formula: distance = speed × time.

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

The distance covered by the first train in 5 hours is: 45 km/h × 5 hours = 225 km.

The distance covered by the second train in 5 hours is: x km/h × 5 hours = 5x km.

Since the total distance between the two cities is 500 km, we can set up the equation:

225 km + 5x km = 500 km

Simplifying the equation:

5x km = 500 km - 225 km

5x km = 275 km

Dividing both sides of the equation by 5:

x km = 275 km / 5

x km = 55 km/h

Therefore, the speed of the second train is 55 km/h.

Answer

The speed of the second train is 55 km/h.