Question

Реши уравнения из двух поселков растояние между которыми 18 км одновременно навстречу друг другу выщли два пешехола ,они встретилис через 2 ч ,один из них шел со скоростью 4 км ч ,с какой скоростью шел второй пешеход

Answer 1

Х- скорость второго пешехода , из условия задачи имеем :
(х + 4) * 2 = 18
х + 4 = 9
х = 9 - 4 = 5 км/ч - скорость второго пешехода

Answer 2

1).4*2=8км прошел один за 2часа
2).18-8=10км прошел второй за 2 часа
3)10:2=5км/ч скорость второго

Answer 3

Problem Analysis

We are given that there are two pedestrians walking towards each other from two villages, and the distance between the villages is 18 km. We also know that they meet each other after 2 hours. One of the pedestrians is walking at a speed of 4 km/h. We need to find the speed at which the second pedestrian is walking.

Solution

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

Since they are walking towards each other, the total distance covered by both pedestrians is equal to the distance between the villages, which is 18 km.

The time taken to cover a certain distance is given by the formula: time = distance / speed.

For the first pedestrian, the time taken is 2 hours, and the speed is 4 km/h. So, the distance covered by the first pedestrian is 2 * 4 = 8 km.

For the second pedestrian, the time taken is also 2 hours, and the speed is x km/h. So, the distance covered by the second pedestrian is 2 * x = 2x km.

Since the total distance covered by both pedestrians is equal to the distance between the villages, we can write the equation: 8 + 2x = 18.

Simplifying the equation, we get: 2x = 18 - 8.

Solving for x, we find: x = 5.

Therefore, the second pedestrian is walking at a speed of 5 km/h.

Answer

The second pedestrian is walking at a speed of 5 km/h.