A car covered the first 400 m distance with a speed of 8 m/s, the next 1200 m with a speed 12 m/s and the last 360 m with a speed of 12 m/s. Calculate the average speed of the car.

10.89

Step-by-step explanation:

The total distance traveled is 1960 m.

400 + 1200 + 360 = 1960

Now, you have to find the time it took to travel each distance.

400 : 8 = 50

1200 : 12 = 100

360 : 12 = 30

The total time it took travel the distance is 180 s.

50 + 100 + 30 = 180

To find the average speed, divided the total distance traveled by the total time.

1960 : 180 = 10.89 s