Question

Помогите решить задачу! Два пешехода вышли навстречу друг другу. Скорость одного из них 3,8 км/ч,а другого на 0,4 км/ч больше:через 0,5 ч. они встретились. Какое расстояние было между ними в начале пути?

Answer 1

1)3,8+0,4=4,2 км/ч скорость второго пешехода
2)3,8+4,2=8 км/ч проходят за час пешеходы вместе
3)8×0,5=4 км расстояние между ними в начале пути

Answer 2

Problem Analysis

We are given that two pedestrians are walking towards each other. The speed of one pedestrian is 3.8 km/h, while the speed of the other pedestrian is 0.4 km/h faster. After 0.5 hours, they meet. We need to find the initial distance between them.

Solution

Let's assume the initial distance between the pedestrians is x km.

The first pedestrian's speed is 3.8 km/h, so in 0.5 hours, they would have covered a distance of 3.8 * 0.5 = 1.9 km.

The second pedestrian's speed is 0.4 km/h faster, so their speed is 3.8 + 0.4 = 4.2 km/h. In 0.5 hours, they would have covered a distance of 4.2 * 0.5 = 2.1 km.

Since they meet after 0.5 hours, the total distance covered by both pedestrians is 1.9 km + 2.1 km = 4 km.

Therefore, the initial distance between them is 4 km.

Answer

The initial distance between the two pedestrians was 4 km.