Question

Поезд совершил вынужденную остановку на 24 мин. Увеличив свою скорость на 10км/ч, он наверстал упущенное время на пути в 80 км. С какой скоростью двигался поезд на этом пути?

Answer 1

24/60=2/5
80/X-80(Х+10)=2/5
Х^2 + 10Х-2000=0
Х=40
Х= -50
 ответ:40 км/час

Answer 2

Calculation of Train Speed

To determine the speed at which the train was moving on the 80 km stretch, we can use the information provided.

The train made a forced stop for 24 minutes and then increased its speed by 10 km/h to make up for the lost time on the 80 km journey.

Let's calculate the speed of the train on this stretch:

1. Calculate the time taken to cover the 80 km distance at the increased speed: - The train made a forced stop for 24 minutes, which is equivalent to 24/60 = 0.4 hours. - The remaining time to cover the 80 km distance is 1 hour (60 minutes) - 0.4 hours = 0.6 hours.

2. Calculate the speed of the train on the 80 km stretch: - Speed = Distance / Time - Speed = 80 km / 0.6 hours - Speed = 133.33 km/h

Therefore, the train was moving at a speed of 133.33 km/h on this 80 km stretch.

Please note that the above calculation assumes a constant speed throughout the journey and does not take into account any other factors that may affect the train's speed.