Question

С одной и той же станции одновременно к противоположным направлениям вышли два поезда пассажирский и товарный .Пассажирсский поезд идет сл скоростью 84 км ч а скорость товарного поезда составляет 75% скорости пасаж. поезда. на каком расстоянии друг от друга будут поезда через20 мин?

Answer 1

84*0,75=63 км/час - скорость товарного поезда

84+63=147км/час - скорость удаления

20мин-1/3 часа

147*1/3=49 км  - расстояние через 20 минут

 

Answer 2

To find the distance between the two trains after 20 minutes, we need to calculate the distance each train has traveled in that time.

Let's start with the passenger train. We know that it is traveling at a speed of 84 km/h. In 20 minutes, it will cover a distance of:

Distance of passenger train = (Speed of passenger train) x (Time) Distance of passenger train = 84 km/h x (20 min / 60 min/h) Distance of passenger train = 84 km/h x (1/3) h Distance of passenger train = 28 km

So, the passenger train will have traveled 28 kilometers in 20 minutes.

Now let's calculate the distance traveled by the freight train. We know that its speed is 75% of the passenger train's speed, which means it is traveling at a speed of:

Speed of freight train = 75% x (Speed of passenger train) Speed of freight train = 75% x 84 km/h Speed of freight train = 63 km/h

In 20 minutes, the freight train will cover a distance of:

Distance of freight train = (Speed of freight train) x (Time) Distance of freight train = 63 km/h x (20 min / 60 min/h) Distance of freight train = 63 km/h x (1/3) h Distance of freight train = 21 km

So, the freight train will have traveled 21 kilometers in 20 minutes.

To find the distance between the two trains, we subtract the distance traveled by the freight train from the distance traveled by the passenger train:

Distance between the two trains = Distance of passenger train - Distance of freight train Distance between the two trains = 28 km - 21 km Distance between the two trains = 7 km

Therefore, after 20 minutes, the passenger and freight trains will be 7 kilometers apart from each other.