Question

Из пункта А в пункт В выехал велосипедист со скоростью 12км/час, через полчаса из этого же пункта выехал другой велосипедист со скоростью 14км/ час. В пункт В они приехали одновремнно. Найти расстояние между пунктами

Answer 1

пусть х - время, которое затратил1 велосипедист чтобы добраться из пункта А в пункт В ,
тогда х-0,5 это время  2 велосипедиста, т.к. он выехал позже на 0,5ч
 расстояние они проехали одинаковое

составляем уравнение
12*х=14(х-0,5)
12*х-14*х=-7
-2*х=-7
х=3,5 ч время 1 велосипедиста

12*3,5=42 км расстояние

Answer 2

Problem Analysis

We are given that a cyclist travels from point A to point B at a speed of 12 km/h, and after half an hour, another cyclist starts from the same point A to point B at a speed of 14 km/h. We need to find the distance between points A and B.

Solution

Let's assume the distance between points A and B is d km.

The first cyclist travels at a speed of 12 km/h for half an hour, which is 0.5 hours. Therefore, the distance covered by the first cyclist is 0.5 * 12 = 6 km.

The second cyclist travels at a speed of 14 km/h for an unknown time. Let's assume the time taken by the second cyclist to reach point B is t hours. Therefore, the distance covered by the second cyclist is 14t km.

Since both cyclists arrive at point B at the same time, the total distance covered by both cyclists is equal to the distance between points A and B. Therefore, we can write the equation:

6 + 14t = d

To find the value of t, we need more information. Unfortunately, the given information is not sufficient to determine the value of t or the distance d between points A and B.

Therefore, we cannot find the exact distance between points A and B with the given information.

Please let me know if there is anything else I can help you with.