Question

С двух станций,расстояние между которыми 720 км,вышли одновременно навстречу друг другу два поезда.Скорость первого поезда 75км/ч, а скорость второго на 10км/ч больше.На каком расстояние друг от друга будут поезда через 4 ч?

Answer 1

10скорость второго поезда

75+10=85 км/час

2)общая скорость поездов

75+85=160 км/час

3)путь поездов за 4 часа

160*4=640 км

4)расстояние между ними через 4 часа

720-640=80 км

Answer 2

75+10=85(км/ч)- скорость 2-ого поезда

75*4=300(км)- проедет 1-ый поезд за 4 часа

85*4=340(км)- проедет 2-ой поезд за 4 часа

720-(300+340)=80(км)- будет расстояние через 4 часа

 

Answer 3

Problem Analysis

We have two trains traveling towards each other from two different stations. The distance between the stations is 720 km. The first train is traveling at a speed of 75 km/h, while the second train is traveling at a speed 10 km/h faster than the first train. We need to find the distance between the trains after 4 hours.

Solution

To find the distance between the trains after 4 hours, we need to calculate the distance each train has traveled in 4 hours and then subtract those distances from the total distance between the stations.

Let's calculate the distance traveled by each train in 4 hours:

- The first train is traveling at a speed of 75 km/h. So, in 4 hours, it will travel a distance of 75 km/h * 4 h = 300 km. - The second train is traveling at a speed 10 km/h faster than the first train, which is 75 km/h + 10 km/h = 85 km/h. So, in 4 hours, it will travel a distance of 85 km/h * 4 h = 340 km.

Now, let's calculate the distance between the trains after 4 hours:

- The total distance between the stations is 720 km. - The first train has traveled a distance of 300 km in 4 hours. - The second train has traveled a distance of 340 km in 4 hours.

To find the distance between the trains after 4 hours, we subtract the sum of the distances traveled by the trains from the total distance between the stations:

Distance between the trains after 4 hours = Total distance between the stations - (Distance traveled by the first train + Distance traveled by the second train)

Distance between the trains after 4 hours = 720 km - (300 km + 340 km)

Distance between the trains after 4 hours = 720 km - 640 km

Distance between the trains after 4 hours = 80 km

Therefore, the trains will be 80 km apart after 4 hours.

Answer

The trains will be 80 km apart after 4 hours.