Question

Поезд отправился из Санкт-Петербурга в 23 ч 15 мин и прибыл в Москву в 6 ч 25 мин следующего дня. По пути он сделал 2 остановки: на станции Бологое и в городе Твери, по 5 мин каждая. С какой скоростью двигался поезд, если он прошёл 651 км? Помогите пожалуйста 2 часа сижу над ней немогу решить.

Answer 1

Условие записывать не умею. Но в пути он был 7 часов 10 минут. Вычитаем 10 минут что он стоял на остановках. Получаем ровно 7 часов пути. Далее 651 км делим на 7 часов пути получаем 93 км в час. Поезд ехал со скоростью 93 км в час.

Answer 2

Problem Analysis

We are given the departure and arrival times of a train from St. Petersburg to Moscow, along with the duration of two stops. We need to calculate the speed of the train.

Solution

To calculate the speed of the train, we can use the formula:

Speed = Distance / Time

We are given the distance traveled by the train, which is 651 km. We need to calculate the time taken by the train to travel this distance.

Calculating the Time Taken

To calculate the time taken by the train, we need to subtract the departure time from the arrival time. However, we also need to consider that the train made two stops, each lasting 5 minutes.

The departure time is 23:15 and the arrival time is 6:25 the next day. Let's calculate the time taken by the train:

1. Calculate the time from departure to midnight: - Departure time: 23:15 - Midnight: 00:00 - Time from departure to midnight: 00:00 - 23:15 = 0 hours and 45 minutes

2. Calculate the time from midnight to arrival: - Midnight: 00:00 - Arrival time: 06:25 - Time from midnight to arrival: 06:25 - 00:00 = 6 hours and 25 minutes

3. Calculate the total time taken by the train: - Time from departure to midnight: 0 hours and 45 minutes - Time from midnight to arrival: 6 hours and 25 minutes - Total time taken: 0 hours and 45 minutes + 6 hours and 25 minutes = 7 hours and 10 minutes

However, we need to subtract the time taken for the two stops, each lasting 5 minutes: - Total time taken: 7 hours and 10 minutes - 2 * 5 minutes = 7 hours

Calculating the Speed

Now that we have the time taken by the train, which is 7 hours, and the distance traveled, which is 651 km, we can calculate the speed:

Speed = Distance / Time = 651 km / 7 hours

Let's calculate the speed of the train:

Speed = 651 km / 7 hours = 93 km/h

Therefore, the train was moving at a speed of 93 km/h.

Answer

The train was moving at a speed of 93 km/h.