Question

Из двух сел,находящихся на расстоянии 30 км,вышли одновременно навстречу друг другу два пешехода и встретелись через 3 ч. Первый пешеход шел со скоростью 4 км/ч. С какой скоростью шел второй пешеход?

Answer 1

3*4=12км.ч.-скорость с которой шел 1 пешеход.    30-12=18км--расстояние  которое преодолел 1 пешеход.  18/3=6км.ч.--скорость 2 пешехода.

Answer 2

Problem Analysis

We have two pedestrians who start walking towards each other from two different villages that are 30 km apart. The first pedestrian walks at a speed of 4 km/h. We need to determine the speed at which the second pedestrian is walking.

Solution

To find the speed of the second pedestrian, we can use the formula:

Speed = Distance / Time

Let's calculate the time it takes for the pedestrians to meet. We know that the total distance between the two villages is 30 km, and the first pedestrian walks at a speed of 4 km/h. Using the formula:

Time = Distance / Speed

Substituting the values, we get:

Time = 30 km / 4 km/h

Calculating this, we find that the time taken for the pedestrians to meet is 7.5 hours.

Now, we can find the speed of the second pedestrian using the formula:

Speed = Distance / Time

Substituting the values, we get:

Speed = 30 km / 7.5 hours

Calculating this, we find that the speed of the second pedestrian is 4 km/h.

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

Answer

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