Question

Два велосипедиста едут навстречу друг другу , расстояние между ними 54 км . Через какое время они встретятся , если скорость первого12 км /ч , а скорость второго 15 км/ч. Помогите пожалуйста!

Answer 1

Решение:
1)12+15=27 км/с-скорость сближения
2)54:27=2 часа
Ответ:Они встретятся через два часа

Answer 2

Problem Analysis

We have two cyclists traveling towards each other. The distance between them is 54 km. The first cyclist has a speed of 12 km/h, while the second cyclist has a speed of 15 km/h. We need to determine how long it will take for them to meet.

Solution

To solve this problem, we can use the formula: time = distance / speed. We can calculate the time it takes for each cyclist to cover the distance between them, and the sum of these times will give us the total time it takes for them to meet.

Let's calculate the time it takes for the first cyclist to cover the distance: - Distance: 54 km - Speed: 12 km/h - Time = 54 km / 12 km/h = 4.5 hours

Now, let's calculate the time it takes for the second cyclist to cover the distance: - Distance: 54 km - Speed: 15 km/h - Time = 54 km / 15 km/h = 3.6 hours

The total time it takes for them to meet is the sum of these two times: - Total time = 4.5 hours + 3.6 hours = 8.1 hours

Therefore, they will meet in approximately 8.1 hours.