Question

товарный поезд выехал со станции в 22:10 со скоростью 72 км/ч а в 23:00 выехал скоростной поезд со скоростью 87км/ч.Вопрос:на каком расстоянии скорый поезд догонит грузовой? помогите пожа (это точто я успел решить:<<1)1200*50=60000м/мин)

Answer 1

1) 72 : 60 * 50 = 60 км прошел расстояние до выхода скоростного поезда т.к. 22:10 - 23:00 = 50 минут он уже шел
2) 87 - 72 = 15 км/ч скорость сближения
3) 60 : 15 = 4 часа, через 4 часа встретятся
4) 87 * 4 = 348 км на этом расстоянии он его догонит

Answer 2

Calculating the Distance for Overtaking

To calculate the distance at which the express train overtakes the freight train, we can use the formula:

Distance = Relative Speed × Time

The relative speed is the difference in speed between the two trains.

Calculations

The freight train travels at 72 km/h, and the express train travels at 87 km/h. The relative speed at which the express train approaches the freight train is the difference between their speeds, which is 87 km/h - 72 km/h = 15 km/h.

Now, we need to convert the relative speed from km/h to m/min to match the units used in your calculation.

15 km/h = 15000 m/h = 15000/60 m/min = 250 m/min.

The time it takes for the express train to catch up to the freight train can be calculated by subtracting the departure times of the two trains.

23:00 - 22:10 = 0:50 hours = 50 minutes.

Now we can use the formula to find the distance:

Distance = Relative Speed × Time

Distance = 250 m/min × 50 min = 12500 m

So, the express train will catch up to the freight train at a distance of 12500 meters.

Final Note

It seems there might be a misunderstanding in the calculation you provided. The calculation you mentioned, 1200*50=60000m/min, doesn't seem to be directly related to the problem of the trains' speeds and overtaking. If you have any further questions or need clarification, feel free to ask!