Question

Срочно!!!!!!!!! поезд отправился из санкт-петербурга в 23ч 15мин и прибыл в москву в 6ч 25 мин. следующего дня. по пути он сделал 2 остановки на станции бологое и в городе тверь по 5 мин. каждая. с какой средней скоростью двигался этот поезд если он проехал 651 км.краткую запись скорее всего надо скажите как её сделать правильно.

Answer 1

Время в пути: 24ч. - 23ч. 15м. = 45 минут до полуночи, 
45м. + 6ч. 25м. = 7ч. 10м. время с остановками 
7ч. 10м. - 2 х 5м. = 7 часов в движении. 
651км : 7час = 93км/час средняя скорость

Answer 2

Calculation of Average Speed

To calculate the average speed of the train, we need to determine the total time taken and the total distance traveled.

The train departed from St. Petersburg at 23:15 and arrived in Moscow at 6:25 the next day. It made two stops along the way, each lasting 5 minutes, at the Bologoye station and in the city of Tver.

To calculate the total time taken, we subtract the departure time from the arrival time, taking into account the stops:

- Departure time: 23:15 - Arrival time: 6:25 - Time spent on stops: 2 stops x 5 minutes each = 10 minutes

To calculate the total distance traveled, we are given that the train traveled 651 km.

Now, let's calculate the total time taken:

- Departure time: 23:15 - Arrival time: 6:25 - Time spent on stops: 10 minutes

The total time taken can be calculated as follows: - Hours: 6 - 23 = 7 hours - Minutes: 25 - 15 = 10 minutes

Therefore, the total time taken is 7 hours and 10 minutes.

Next, let's calculate the average speed of the train:

- Total distance traveled: 651 km - Total time taken: 7 hours and 10 minutes

To convert the total time taken to hours, we divide the minutes by 60 and add it to the hours:

- 10 minutes / 60 = 0.1667 hours

Adding this to the 7 hours, we get a total time of approximately 7.1667 hours.

Now, we can calculate the average speed by dividing the total distance traveled by the total time taken:

- Average speed = Total distance / Total time - Average speed = 651 km / 7.1667 hours

Calculating this, we find that the average speed of the train is approximately 90.71 km/h.

Please note that this calculation assumes a constant speed throughout the journey and does not take into account any other factors that may have affected the train's speed or travel time.