Question

Из поселка вышли одновременно в противоположных направлениях два пешехода. Через 3 ч расстояние между ними было 27 км . первый пешеход шел со скоростью 5км/ч. с какой скоростью шел второй пешеход?

Answer 1

Решение:
3×5=15 км прошел первый пешеход
27-15=12 км прошел второй пешеход
12÷3=4 км/ч скорость второго пешехода

Answer 2

(27-(3*5)):3=4 (км/ч)- скорость второго пешехода

Answer 3

Problem Analysis

We have two pedestrians who start walking in opposite directions from a village at the same time. After 3 hours, the distance between them is 27 km. The first pedestrian walks at a speed of 5 km/h. We need to determine the speed at which the second pedestrian is walking.

Solution

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

After 3 hours, the first pedestrian would have covered a distance of 5 km/h * 3 hours = 15 km.

The distance between the two pedestrians is 27 km, and the first pedestrian has already covered 15 km. Therefore, the second pedestrian must have covered the remaining distance of 27 km - 15 km = 12 km.

We can set up the following equation to solve for the speed of the second pedestrian:

Distance = Speed * Time

12 km = x km/h * 3 hours

Simplifying the equation, we have:

12 km = 3x km/h

To solve for x, we divide both sides of the equation by 3:

12 km / 3 = 3x km/h / 3

4 km/h = x km/h

Therefore, the second pedestrian is walking at a speed of 4 km/h.

Answer

The second pedestrian is walking at a speed of 4 km/h.