Question

Два поезда отошли одновременно от станции Яр исследований в одном направлении Скорость одного поезда 80 км ч а другого 100 км ч Какое расстояние будет между поездами через 3 часа Петя решил эту задачу так 80 х 3 240 км 100 x 300 км 300 минус 240 равно 60 месяц сказала что что он решил эту задачу 2 способами

Answer 1

1) 80*3=240 км проехал 1 поезд
2) 100*3=300 км проехал второй поезд
3) 300-240=60 км расстояние между поездами

второй способ

1) 100-80=20 км/ч разница в скорости
2) 20*3=60 км расстояние между поездами

Answer 2

Problem Analysis

The problem states that two trains depart simultaneously from the station "Yar of Research" in the same direction. The speed of one train is 80 km/h, and the speed of the other train is 100 km/h. We need to find the distance between the trains after 3 hours.

Solution

To find the distance between the trains after 3 hours, we can use the formula: distance = speed × time.

Let's calculate the distance traveled by each train after 3 hours:

- Train 1: Speed = 80 km/h, Time = 3 hours - Distance = 80 km/h × 3 hours = 240 km

- Train 2: Speed = 100 km/h, Time = 3 hours - Distance = 100 km/h × 3 hours = 300 km

Therefore, the distance between the trains after 3 hours will be the difference between the distances traveled by each train:

- Distance between the trains = Distance of Train 2 - Distance of Train 1 - Distance between the trains = 300 km - 240 km = 60 km

So, the distance between the trains after 3 hours is 60 km.

Alternative Solution

There is another way to solve this problem using a different approach. We can calculate the distance between the trains by considering the relative speed between them.

The relative speed between the two trains is the difference between their speeds:

- Relative speed = Speed of Train 2 - Speed of Train 1 - Relative speed = 100 km/h - 80 km/h = 20 km/h

Now, we can calculate the distance between the trains using the formula: distance = relative speed × time.

- Distance between the trains = Relative speed × Time - Distance between the trains = 20 km/h × 3 hours = 60 km

So, the distance between the trains after 3 hours is 60 km.

Both methods yield the same result, which is 60 km.

I hope this helps! Let me know if you have any further questions.