Question

Из двух пунктов,расстояние между которыми 7 км 500 м,одновременно в одном направлении вышел пешеход со скоростью 6 км/ч и выехал автобус.Определите скорость автобуса, если он догнал пешехода через 15 мин.

Answer 1

15хв=0,25час.

6км=6000м

6000 х 0,25 = 1500(м) - прошел пешеход за 15мин.

7500 + 1500 = 9000(м) - проехал автобус за 15мин.

9000 : 0,25 = 36000(м/час) = 36км/час

Ответ: скорость автобуса 36км/час

Answer 2

Problem Analysis

We are given that the distance between two points is 7 km 500 m. A pedestrian starts walking from one point at a speed of 6 km/h, and at the same time, a bus starts from the same point and catches up to the pedestrian in 15 minutes. We need to determine the speed of the bus.

Solution

To solve this problem, we can use the formula: speed = distance / time.

Let's calculate the time it takes for the bus to catch up to the pedestrian. We are given that the time is 15 minutes, which we need to convert to hours. Since 1 hour is equal to 60 minutes, we can divide 15 minutes by 60 to get the time in hours.

15 minutes = 15 / 60 hours = 0.25 hours

Now, let's calculate the distance traveled by the pedestrian in 0.25 hours. We can use the formula: distance = speed × time.

distance = 6 km/h × 0.25 hours = 1.5 km

Since the bus catches up to the pedestrian, the distance traveled by the bus is equal to the distance between the two points, which is 7 km 500 m.

Let's convert 500 m to km by dividing it by 1000:

500 m = 500 / 1000 km = 0.5 km

Now, we can calculate the speed of the bus using the formula: speed = distance / time.

speed = 7 km + 0.5 km / 0.25 hours = 7.5 km / 0.25 hours = 30 km/h

Therefore, the speed of the bus is 30 km/h.

Answer

The speed of the bus is 30 km/h.