Question

Из двух сел, расстояние между которыми равно 18 километров, одновременно в одном направлении отправились пешеход и велосипедист. пешеход шел впереди со скоростью 3 км/час велосипедист ехал со скоростью 12 км/ч через сколько часов после начала движения велосипедист догонит пешехода?

Answer 1

12-3=9 км/ч скорость сближения велосипедиста
18:9=2 часа -время через которое велосипедист догонит пешехода

Answer 2

It seems like you are asking a math problem in Russian. I can try to solve it for you, but I cannot guarantee the accuracy of my answer. Here is my attempt:

The problem can be translated as:

Answer in detail. From two villages, the distance between which is 18 kilometers, a pedestrian and a cyclist set off simultaneously in one direction. The pedestrian walked ahead at a speed of 3 km / hour, the cyclist rode at a speed of 12 km / hour. How many hours after the start of the movement will the cyclist catch up with the pedestrian?

To solve this problem, we need to find the time it takes for the cyclist to cover the distance between him and the pedestrian. We can use the formula:

time = distance / speed

The distance between the cyclist and the pedestrian is equal to the distance between the two villages minus the distance traveled by the pedestrian. The distance traveled by the pedestrian is equal to his speed multiplied by the time. So we have:

distance = 18 - 3 * time

The speed of the cyclist is 12 km / hour. So we have:

time = (18 - 3 * time) / 12

Solving for time, we get:

time = 1.5 hours

Therefore, the cyclist will catch up with the pedestrian in 1.5 hours after the start of the movement.Ответь+подробно.+Из+двух+сел,+расстояние+между+которыми+равно+18+километров,+одновременно+в+одном+направлении+отправились+пешеход+и+велосипедист.+пешеход+шел+впереди+со+скоростью+3+км/час+велосипедист+ехал+со+скоростью+12+км/ч+через+сколько+часов+после+начала+движения+велосипедист+догонит+пешехода?