Question

Поезд прошёл 485 км.Первые 2 часа поезд шёл со скоростью 55 км/ч, а потом - со скоростью 75 км/ч.Сколько времени поезд затратил на весь путь?

Answer 1

55*2=110 км поезд прошел за первые 2 часа

485-110=375 столько поезд двигался со скоростью 75 км/ч

375/75=5 часов поезд двигался остаток пути

5+2=7 общее время

Answer 2

Calculation of the Time Taken by the Train

To calculate the time taken by the train to cover the entire distance, we need to consider the two different speeds at which the train traveled.

The train traveled the first 2 hours at a speed of 55 km/h and the remaining distance at a speed of 75 km/h.

To find the time taken for the first part of the journey, we can use the formula:

Time = Distance / Speed

For the first part of the journey, the distance covered is 55 km/h * 2 hours = 110 km.

For the second part of the journey, the distance covered is 485 km - 110 km = 375 km.

Now, we can calculate the time taken for the second part of the journey:

Time = Distance / Speed

Time = 375 km / 75 km/h = 5 hours

Therefore, the total time taken by the train to cover the entire distance is:

2 hours + 5 hours = 7 hours.

So, the train took 7 hours to cover the entire distance of 485 km.