Question

Автомашина шла 3 часа со скоростью 53,5 км/ч, 2ч ср скоростью 62,3км/ч и 4 ч со скоростью 48,2 км/ с найдите среднюю скорость движения автомашины на всем пути.

Answer 1

53.5x3=160.5 км прошла за три часа
62.3x2=126.4км прошла за 2часа
48.2 x4=192.8км прошла за 4 часа
160.5+124.6+192.8:9=53,1км средняя скорость движения автомашины на всем пути

Answer 2

53.5*3=160.5 
62.3*2=124.6 
48,2*4=192.8 

(160,5+124,6+192,8):(3+2+4)=53,1 

ответ 53,1

Answer 3

Calculation of Average Speed

To find the average speed of the car over the entire journey, we need to calculate the total distance traveled and the total time taken.

Let's break down the journey into three parts:

1. The car traveled for 3 hours at a speed of 53.5 km/h. 2. The car traveled for 2 hours at a speed of 62.3 km/h. 3. The car traveled for 4 hours at a speed of 48.2 km/h.

To calculate the total distance traveled, we sum up the distances covered in each part:

1. Distance covered in the first part = (3 hours) * (53.5 km/h) = 160.5 km. 2. Distance covered in the second part = (2 hours) * (62.3 km/h) = 124.6 km. 3. Distance covered in the third part = (4 hours) * (48.2 km/h) = 192.8 km.

The total distance traveled is the sum of these distances:

Total distance = 160.5 km + 124.6 km + 192.8 km = 477.9 km.

To calculate the total time taken, we sum up the times taken in each part:

1. Time taken in the first part = 3 hours. 2. Time taken in the second part = 2 hours. 3. Time taken in the third part = 4 hours.

The total time taken is the sum of these times:

Total time = 3 hours + 2 hours + 4 hours = 9 hours.

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

Average speed = Total distance / Total time = 477.9 km / 9 hours = 53.1 km/h.

Therefore, the average speed of the car over the entire journey is 53.1 km/h.