Question

электропоезд отправился из города в 9ч 15мин и прибыл в 10ч 12мин. По пути он делал остановку на кажой промежуточной станции в среднем на 35сек. Сколько времени электропоезд находился в движениидо конечной станции? С какой средней скоростью он двигался,если известно что расстояние города до конечной станции 48км?(Вырази расстояние в метрах,а время в минутах). (4 класс)

Answer 1

1)12 * 35=420(сек)-затрачено на остановки

1мин=60сек 

2)420:60=7(мин)-затрачено на остановки

9ч15м=555(мин); 10ч12(м)=612(мин).

3)612-555=57(мин)-электровоз потратил время на поездку.

4)57-7=50(мин)-электропоезд был в движении.

48км=48000(м)

5)48000:50=960(м/мин)-средняя скорость электропоезда.

Ответ: 50 минут был в движении; 960м/минуту средняя скорость электропоезда.

Answer 2

Calculation of Time in Motion and Average Speed

To calculate the time the train was in motion and its average speed, we need to consider the departure time, arrival time, and the time spent at each intermediate station.

Given information: - Departure time: 9:15 AM - Arrival time: 10:12 AM - Average time spent at each intermediate station: 35 seconds - Distance from the city to the final station: 48 km

To calculate the time the train was in motion, we need to subtract the time spent at intermediate stations from the total travel time. Let's break down the calculation step by step:

1. Convert the departure and arrival times to minutes: - Departure time: 9:15 AM = 9 * 60 + 15 = 555 minutes - Arrival time: 10:12 AM = 10 * 60 + 12 = 612 minutes

2. Calculate the total travel time: - Total travel time = Arrival time - Departure time = 612 - 555 = 57 minutes

3. Calculate the number of intermediate stations: - The train made stops at each intermediate station, and the average time spent at each station was 35 seconds. - Since there are 60 seconds in a minute, the average time spent at each station is 35/60 = 0.583 minutes.

4. Calculate the total time spent at intermediate stations: - Total time spent at intermediate stations = Number of intermediate stations * Average time spent at each station - Since the train made stops at each intermediate station, the number of intermediate stations is the same as the number of stops. - To calculate the number of stops, we need to subtract 1 from the total number of stations. Since the number of stations is not provided, we cannot calculate the exact number of stops.

5. Calculate the time the train was in motion: - Time in motion = Total travel time - Total time spent at intermediate stations

6. Calculate the average speed: - Average speed = Distance / Time in motion

Let's calculate the time the train was in motion and its average speed using the given information.