Question

От москвы до киева870км поезд вышедший из москвы шёл6 часов со средней скоростью 85 км\ч а остальнойпуть до киева он прошёлза4часа с кокой средней скоростью он шёл эти4 часа

Answer 1

1)85*6=510(КМ)- прошел за 6 часов

2)870-510=360(км)- осталось пройти

3)360/4=90(км/ч)- шел 4 часа

Answer 2

1)85*6=510км-прошёл за 6 часов. 2)870-510=360 км- осталось пройти за 4 часа. 3)360:4=90км/ч- средняя скорость оставшегося пути.

Answer 3

Calculating Average Speed of the Train

To find the average speed of the train for the entire journey, we can use the formula:

Average Speed = Total Distance / Total Time

First, let's calculate the total time and total distance for the journey.

The total distance from Moscow to Kiev is 870 km.

The train traveled the first part of the journey (Moscow to an intermediate point) in 6 hours at an average speed of 85 km/h, and the second part of the journey (from the intermediate point to Kiev) in 4 hours.

Calculating Total Time

The total time for the journey can be calculated by adding the time taken for the first part of the journey to the time taken for the second part.

Total Time = Time for First Part + Time for Second Part

Total Time = 6 hours + 4 hours Total Time = 10 hours

Calculating Total Distance

The total distance for the journey is already given as 870 km.

Calculating Average Speed

Now, we can use the formula to calculate the average speed of the train for the entire journey.

Average Speed = Total Distance / Total Time Average Speed = 870 km / 10 hours Average Speed = 87 km/h

So, the average speed of the train for the entire journey from Moscow to Kiev is 87 km/h.