Question

Расстояние от села до города 50км. Из села в город вышел пешеход со скоростью 5км/ч. Через 2 часа навстречу ему из города в село выехал велосипедист со скоростью 15км/ч. Через какое время произойдёт встреча?

Answer 1

1) 5*2=10 (км) - прошел пешеход
2) 50-10=40(км) - расстояние между пеш. и велосипедистом
3) 15+5=20(км/час) - скорость сближения
4) 40/20=2(ч)
Ответ: через 2 часа.

Answer 2

Problem Analysis

We are given the following information: - The distance from the village to the city is 50 km. - A pedestrian walks from the village to the city at a speed of 5 km/h. - After 2 hours, a cyclist rides from the city to the village at a speed of 15 km/h.

We need to determine how long it will take for the pedestrian and the cyclist to meet.

Solution

To solve this problem, we can use the formula:

Time = Distance / Speed

Let's calculate the time it takes for the pedestrian to meet the cyclist.

The distance covered by the pedestrian in 2 hours is: Distance = Speed * Time = 5 km/h * 2 h = 10 km

Now, let's calculate the remaining distance between the cyclist and the pedestrian: Remaining Distance = Total Distance - Distance Covered by Pedestrian = 50 km - 10 km = 40 km

To find the time it takes for the cyclist to cover the remaining distance, we can use the formula: Time = Distance / Speed = 40 km / 15 km/h

Let's calculate the time it takes for the cyclist to cover the remaining distance:

Time = 40 km / 15 km/h = 2.67 hours

Therefore, the pedestrian and the cyclist will meet approximately 2.67 hours after the cyclist starts riding.

Answer

The pedestrian and the cyclist will meet approximately 2.67 hours after the cyclist starts riding.