Question

Из двух пунктов ,расстояние между которыми 40 км, навстречу друг другу одновременно отправились пешеход и велосипедист. Скорость велосип.в 4 раза больше скорости пешехода . Найдите скорости пешехода и велосип.если известно, что они встретились через 2,5ч после своего выхода

Answer 1

Х - скорость пешехода
4х - скорость велосипедиста
х*2,5 + 4х * 2,5 = 40
12,5х = 40
х = 3,2 км/ч - скорость пешехода
4*3,2 = 12,8 км/ч - скорость велосипедиста

Answer 2

Problem Analysis

We are given that the distance between two points is 40 km. A pedestrian and a cyclist start simultaneously from these points and meet each other after 2.5 hours. The cyclist's speed is 4 times greater than the pedestrian's speed. We need to find the speeds of the pedestrian and the cyclist.

Solution

Let's assume the speed of the pedestrian is x km/h. Since the cyclist's speed is 4 times greater, the speed of the cyclist is 4x km/h.

We can use the formula distance = speed × time to solve this problem. The total distance covered by both the pedestrian and the cyclist is 40 km. The time taken is 2.5 hours.

For the pedestrian: distance = speed × time 40 = x × 2.5 x = 40 / 2.5 x = 16 km/h

For the cyclist: distance = speed × time 40 = 4x × 2.5 40 = 10x x = 40 / 10 x = 4 km/h

Therefore, the speed of the pedestrian is 16 km/h and the speed of the cyclist is 4 km/h.

Answer

The speed of the pedestrian is 16 km/h and the speed of the cyclist is 4 km/h.