The cyclist traveled the first section in half an hour at a speed of 8 m / s, and he covered the second section in 20 minutes.

The cyclist traveled the first section in half an hour at a speed of 8 m / s, and he covered the second section in 20 minutes. What is the speed of the car on the second leg if the total distance covered by the cyclist is 30 km?

Since the cyclist moves uniformly in a straight line, the path traveled by him is: S = Vt.
The length of the first section is:
L1 = 1800 * 8 = 14400m. This means that the length of the second section is: L2 = 30000-14400 = 15600m
Since the cyclist covered the second section in 20 minutes, the speed will be: V2 = 13m / s