Question

трактор проехал 1000 м за время равное 8 минут а за следующие 20 минут он проехал 4 км определите среднюю скорость трактора За всё время

Answer 1

S1 = 1000м  

t1 = 8мин = 480c  

S2 = 4 км = 4000м  

t2 = 20мин = 1200с  

Чтобы определить среднюю скорость, необходимо весь пройденный путь разделить на все затраченное время. Отсюда:  

Vср = S1+S2/t1+t2

Answer 2

Calculation of Average Speed

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

According to the given information: - The tractor traveled 1000 meters in 8 minutes. - The tractor then traveled an additional 4 kilometers in the next 20 minutes.

To find the total distance traveled, we need to convert the 4 kilometers into meters. Since 1 kilometer is equal to 1000 meters, the additional distance traveled is 4 kilometers * 1000 meters/kilometer = 4000 meters.

The total distance traveled by the tractor is 1000 meters + 4000 meters = 5000 meters.

The total time taken is 8 minutes + 20 minutes = 28 minutes.

Now, we can calculate the average speed using the formula:

Average Speed = Total Distance / Total Time

Substituting the values, we get:

Average Speed = 5000 meters / 28 minutes

To convert the average speed to a more common unit, we can convert minutes to hours. Since there are 60 minutes in an hour, the conversion factor is 1 hour / 60 minutes.

Average Speed = (5000 meters / 28 minutes) * (1 hour / 60 minutes)

Simplifying the expression, we get:

Average Speed = 5000 meters * (1 hour / 28 minutes * 60 minutes)

Calculating the result, we find:

Average Speed ≈ 10.714 meters per minute

Therefore, the average speed of the tractor for the entire duration is approximately 10.714 meters per minute.

Please note that the sources provided did not contain relevant information for this specific calculation.