Question

Два велосипедиста выехали одновременно навстречу друг другу из двух сёл, расстояние между которыми 54 км.Через сколько часов велосипедисты будут друг от друга на расстоянии 27 км, если их скорости 12км/ч и 15 км/ч?

Answer 1

1) 54-27=27(км)- надо проехать велосипедистам вместе.
2) 12+15=27(км/ч)- общая скорость.
3)27:27=1(ч)- через столько велосипедисты будут на расстоянии 27 км.
Ответ: 1 час.

Answer 2

Чтобы быть на расстоянии друг от друга 27 км, они должны проехать:
54-27 = 27 км
находим скорость сближения: 12+15=27 км/ч
27/27=1час
через 1 час они встретятся

Answer 3

Problem Analysis

We have two cyclists starting simultaneously from two different villages and traveling towards each other. The distance between the villages is 54 km. We are given the speeds of the two cyclists, 12 km/h and 15 km/h, and we need to determine how many hours it will take for them to be 27 km apart.

Solution

To solve this problem, we can use the formula: time = distance / speed. We can calculate the time it takes for each cyclist to travel a certain distance and then find the time it takes for them to be 27 km apart.

Let's calculate the time it takes for each cyclist to travel 27 km:

Cyclist 1: - Distance: 27 km - Speed: 12 km/h - Time = 27 km / 12 km/h = 2.25 hours

Cyclist 2: - Distance: 27 km - Speed: 15 km/h - Time = 27 km / 15 km/h = 1.8 hours

Since they started simultaneously, we need to find the maximum time it takes for them to be 27 km apart. In this case, it is 2.25 hours.

Therefore, it will take approximately 2.25 hours for the two cyclists to be 27 km apart.

Answer

It will take approximately 2.25 hours for the two cyclists to be 27 km apart.