Question

Из пункта А и В, расстояние между которыми 8 км, одновременно в одном направлении выехал автобус и вышел пешеход со скоростью 4 км/ч. Найдите скорость автобуса, зная, что он через 15 минут догнал пешехода.

Answer 1

Скорость пешехода - 4 км час, т е 1 км за 15 мин. за это время автобус проехал 8+1 км, т е 9 км за 15 мин, 9*4= 36 км/ч

Answer 2

Problem Analysis

We are given that a bus and a pedestrian start from points A and B, which are 8 km apart. The pedestrian walks at a speed of 4 km/h. After 15 minutes, the bus catches up to the pedestrian. We need to find the speed of the bus.

Solution

To find the speed of the bus, we can use the formula:

Speed = Distance / Time

Let's calculate the time it takes for the bus to catch up to the pedestrian.

The time taken by the bus to catch up to the pedestrian is given as 15 minutes. We need to convert this time to hours.

15 minutes = 15/60 hours = 0.25 hours

Now, let's calculate the distance traveled by the pedestrian in 0.25 hours.

Distance = Speed * Time Distance = 4 km/h * 0.25 hours = 1 km

Since the bus catches up to the pedestrian, the distance traveled by the bus is also 1 km.

Now, we can use the formula to find the speed of the bus.

Speed = Distance / Time Speed = 1 km / 0.25 hours = 4 km/h

Therefore, the speed of the bus is 4 km/h.

Answer

The speed of the bus is 4 km/h.