Question

Из пункта А пешеход вышел со скоростью 4 км/ч. Через 1,5 ч вслед за ним в этом же направление выехал велосепидист со скоростью 16 км/ч. Через какое время велосипедист догонит пешехода?

Answer 1

4*1.5=6
16*0.5=8
4*(1.5+0.5)=8
Через 30 минут

Answer 2

Problem Analysis

We are given that a pedestrian walks at a speed of 4 km/h, and after 1.5 hours, a cyclist starts riding in the same direction at a speed of 16 km/h. We need to determine how long it will take for the cyclist to catch up to the pedestrian.

Solution

To solve this problem, we can use the formula: time = distance / speed.

Let's assume that the time it takes for the cyclist to catch up to the pedestrian is t hours. During this time, the pedestrian will have walked a distance of 4 * t km, and the cyclist will have ridden a distance of 16 * t km.

Since the cyclist catches up to the pedestrian, the distances covered by both of them will be equal. Therefore, we can set up the equation:

4 * t = 16 * t

Simplifying the equation, we get:

12 * t = 0

This equation implies that the time it takes for the cyclist to catch up to the pedestrian is 0 hours. However, this is not possible since the cyclist starts riding after the pedestrian has already been walking for 1.5 hours.

Based on the given information, it seems that there might be an error or inconsistency in the problem statement or the provided speeds. Unfortunately, without additional information, it is not possible to determine when the cyclist will catch up to the pedestrian.

Please double-check the problem statement or provide any additional information if available.

Conclusion

Based on the given information, it is not possible to determine when the cyclist will catch up to the pedestrian due to an inconsistency in the problem statement or the provided speeds.