Question

Из пунктов А и В,расстояние между которыми 70 км,отправились одновременно пешеход и велосипедист со скоростями 5 км/ч и 15 км/ч соответственно. Какое расстояние будет между ними через 3 часа?

Answer 1

15•3+5•3=60км расст. велосепедиста и пешехода 70-60=10км

Answer 2

Problem Analysis

We are given two points, A and B, with a distance of 70 km between them. A pedestrian and a cyclist start simultaneously from points A and B, respectively, with speeds of 5 km/h and 15 km/h. We need to find the distance between them after 3 hours.

Solution

To find the distance between the pedestrian and the cyclist after 3 hours, we need to calculate the distance each of them has traveled in that time.

The distance traveled by the pedestrian can be calculated using the formula: distance = speed × time. Substituting the given values, we have: distance_pedestrian = 5 km/h × 3 h = 15 km.

Similarly, the distance traveled by the cyclist can be calculated as: distance_cyclist = 15 km/h × 3 h = 45 km.

Now, we can find the distance between them by subtracting the distance traveled by the pedestrian from the total distance between points A and B: distance_between = 70 km - 15 km = 55 km.

Therefore, the distance between the pedestrian and the cyclist after 3 hours will be 55 km.

Answer

The distance between the pedestrian and the cyclist after 3 hours will be 55 km.