Question

Поезд должен пройти 700км за 9 часов . Первые 3 часа он шел со скоростью 70 км/ч следующие 2 часа со скоростью 85 км/ч . С какой скоростью он должен идти оставшийся путь, чтобы пройти в пункт назначения по расписанию

Answer 1

1)70×3=210
2)85×2=170

3)210+170=380

4)700-380=320

5)3+2=5
6)9-5=4

7)320:4=80

Ответ:Поезд должен двигаться за оставшееся время 80 км.ч.

 

Answer 2

Calculation of the Remaining Distance

To determine the speed at which the train should travel for the remaining distance in order to arrive at its destination on schedule, we need to calculate the distance covered in the first 5 hours and subtract it from the total distance of 700 km.

The train traveled at a speed of 70 km/h for the first 3 hours, covering a distance of 70 km/h * 3 hours = 210 km. Then, it traveled at a speed of 85 km/h for the next 2 hours, covering a distance of 85 km/h * 2 hours = 170 km.

Therefore, the total distance covered in the first 5 hours is 210 km + 170 km = 380 km.

To find the remaining distance, we subtract the distance covered in the first 5 hours from the total distance: 700 km - 380 km = 320 km.

Calculation of the Required Speed

To calculate the speed at which the train should travel for the remaining distance, we divide the remaining distance by the remaining time.

The remaining time is 9 hours - 5 hours = 4 hours.

Therefore, the required speed for the remaining distance of 320 km is 320 km / 4 hours = 80 km/h.

So, the train should travel at a speed of 80 km/h for the remaining 4 hours in order to arrive at its destination on schedule.

Please note that the calculations provided are based on the information given and assume a constant speed throughout each time interval.