Question

Из двух сел, расстояние между которыми 9 км, одновременно в одном направлении выехали 2 всадника. Впереди ехал всадник со скоростью 7 км в час. Через 3 часа его догнал второй всадник. Определить скорость второго всадника

Answer 1

7*3 =21 км за 3 часа проехал 1 всадник 
значит 2 всадник едет 21 км в час

Answer 2

Problem Analysis

We are given that two riders started simultaneously from two villages, with a distance of 9 km between them. The first rider is traveling at a speed of 7 km/h, and after 3 hours, the second rider catches up to the first rider. We need to determine the speed of the second rider.

Solution

Let's assume the speed of the second rider is x km/h.

The first rider travels for 3 hours at a speed of 7 km/h, covering a distance of 3 * 7 = 21 km.

When the second rider catches up to the first rider, the total distance covered by both riders is 9 km.

Therefore, the distance covered by the second rider is 9 - 21 = -12 km.

Since distance cannot be negative, it means that the second rider hasn't caught up to the first rider yet.

Hence, there is no solution to this problem.

Answer

There is no solution to this problem. The second rider has not caught up to the first rider yet.