The motorcyclist traveled 5 km for the first 10 minutes of movement, and for the next 20 minutes, 12.5 km

The motorcyclist traveled 5 km for the first 10 minutes of movement, and for the next 20 minutes, 12.5 km, what is the average speed of a motorcyclist along the entire path.

Given: SI
t1 = 10 min 600 sec
S1 = 5 km 5000 m
t2 = 20 min 1200 sec
S2 = 12.5 km 12,500 m
Find: Vср -?
Decision:
average speed formula:
Vav = (S1 + S2) / (t1 + t2)
Vav = (5000 + 12500) / (600 + 1200) = 17500/1800 = 9.72 m / s
Answer: Vav = 9.72 m / s