Question

Два пешехода находились на расстоянии 5,12 км. Навстречу друг другу вышли они одновременно и через 0,8 ч встретились. Скорость одного пешехода 3,6 км/ч. Найдите скорость другого пешехода.

Answer 1

5,12:0,8=6,4 км/час скорость сближения
6,4-3,6=2,8 км/час скорость второго
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Answer 2

Problem Analysis

We have two pedestrians who start walking towards each other simultaneously. The distance between them is 5.12 km. After 0.8 hours, they meet. We need to find the speed of the second pedestrian.

Solution

Let's assume the speed of the first pedestrian is x km/h. We are given that the speed of the first pedestrian is 3.6 km/h.

Using the formula distance = speed × time, we can calculate the distance covered by the first pedestrian in 0.8 hours:

distance = speed × time 5.12 km = 3.6 km/h × 0.8 h

Now, let's solve for the speed of the second pedestrian.

Calculation

To find the speed of the second pedestrian, we can use the formula speed = distance / time.

speed of the second pedestrian = distance / time speed of the second pedestrian = 5.12 km / 0.8 h

Now, let's calculate the speed of the second pedestrian.

Speed Calculation

Using the given values, we can calculate the speed of the second pedestrian:

speed of the second pedestrian = 5.12 km / 0.8 h speed of the second pedestrian = 6.4 km/h

Therefore, the speed of the second pedestrian is 6.4 km/h.

Answer

The speed of the second pedestrian is 6.4 km/h.