Question

Из пункта А в пункт Б выехал велосипедист со скоростью 12 км.ч.Через час навстречу ему из Б в А выехал второй велосипедист со скоростью 14 км.ч. и встретился с первым через 1/2часов после своего выезда. чему равно расстояние от А до Б? Сколько времени затратил первый велосипедист на сесь путь?

Answer 1

12*1=12 км проехал первый за 1 час из

12*1/2=6 км проехал первый за 1/2 часа

12+6=18 км всего проехал первый

14*1/2=7 км проехал второй

18+7=25 км

25:12=2 1/12 ч или 2 часа 5 мин

Ответ : 25 км расстояние от А до В ; 2 1/12 ч или 2 часа 5 мин

Answer 2

Problem Analysis

We are given that a cyclist travels from point A to point B at a speed of 12 km/h. After one hour, another cyclist travels from point B to point A at a speed of 14 km/h. They meet each other after half an hour. We need to find the distance between points A and B and the time taken by the first cyclist to complete the entire journey.

Solution

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

We know that the first cyclist travels from A to B at a speed of 12 km/h. Therefore, the time taken by the first cyclist to travel from A to B is given by:

Time taken by the first cyclist = Distance / Speed = d / 12 After one hour, the second cyclist starts from B and travels towards A at a speed of 14 km/h. They meet each other after half an hour. This means that the second cyclist traveled for half an hour at a speed of 14 km/h, which is equal to the distance between A and B. Therefore, we can write:

Distance between A and B = Speed * Time = 14 * 0.5 = 7 km Now, we can substitute the value of the distance between A and B in equation into equation to find the time taken by the first cyclist to complete the entire journey:

Time taken by the first cyclist = Distance / Speed = 7 / 12 hours

Answer

The distance between points A and B is 7 km. The first cyclist takes 7 / 12 hours to complete the entire journey.

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