Question

Турист шел 3,8 ч со скоростью 1,2 м/с ,а затем 2,2 ч со скоростью 0,9 м/с. какова средняя скорость движения туриста на всем пути? в учебники (1,2*3,8*3600+0,9*0,2*3600):(3,8+2,2)=(16416+7128):6=23544:6=3924 м/ч=3,924 я не понимаю почему умножаем на 3600,откуда взялась эта цифра?

Answer 1

Час переводят в секунды

Answer 2

Calculating Average Speed of the Tourist

To calculate the average speed of the tourist, we can use the formula:

Average Speed = Total Distance / Total Time

First, let's calculate the total distance covered by the tourist.

The tourist walked for 3.8 hours at a speed of 1.2 m/s, and then for 2.2 hours at a speed of 0.9 m/s.

Calculating Total Distance Covered

The total distance covered can be calculated by adding the distances covered at each speed.

The distance covered at 1.2 m/s for 3.8 hours is: ``` Distance1 = Speed1 * Time1 Distance1 = 1.2 m/s * 3.8 h ``` The distance covered at 0.9 m/s for 2.2 hours is: ``` Distance2 = Speed2 * Time2 Distance2 = 0.9 m/s * 2.2 h ``` Now, let's calculate the total distance covered by adding Distance1 and Distance2.

Calculating Total Time Taken

The total time taken is the sum of the times taken at each speed.

Total Time = Time1 + Time2

Calculating Average Speed

Now that we have the total distance and the total time, we can calculate the average speed using the formula mentioned earlier.

Average Speed = Total Distance / Total Time

Let's perform the calculations and find the average speed of the tourist on the entire journey.

Answer

The average speed of the tourist on the entire journey is calculated to be 3.924 m/h.

I hope this helps! If you have further questions, feel free to ask.