Question

Из пункта А в пункт Б вышел пешеход со скоростью 5 км/ч. Одновременно с ним из А в Б выехал велосипидист 10 км/ч. Велосипедист доехал до Б повернул и поехал навстречу пешеходу. Через сколько чесов после начала движения они встретятся если расстояние между А и Б 30 км?

Answer 1

Через 4 часа за три часа велосипедист доедет до Б пешеход пройдет 15 км велосипедист развернется и через 1 час проедет 10 км а пешеход пройдет еше 5 км 15км+5км+10км=30км 3ч+1ч=4ч

Answer 2

Problem Analysis

We are given that a pedestrian walks from point A to point B at a speed of 5 km/h, while a cyclist rides from point A to point B at a speed of 10 km/h. The cyclist then turns around and rides towards the pedestrian. We need to determine how many hours it will take for them to meet if the distance between points A and B is 30 km.

Solution

To solve this problem, we can use the concept of relative speed. The relative speed between the cyclist and the pedestrian is the sum of their individual speeds. In this case, the relative speed is 10 km/h + 5 km/h = 15 km/h.

We can calculate the time it takes for the cyclist and the pedestrian to meet by dividing the distance between points A and B by their relative speed.

Let's calculate the time it takes for them to meet:

Step 1: Calculate the time it takes for them to meet using the formula: time = distance / speed.

Given: - Distance between points A and B = 30 km - Relative speed = 15 km/h

Step 2: Substitute the values into the formula and calculate the time: time = 30 km / 15 km/h = 2 hours.

Therefore, the cyclist and the pedestrian will meet 2 hours after they start moving.

Answer

The cyclist and the pedestrian will meet 2 hours after they start moving.

Note: The sources provided did not contain relevant information for this specific problem.