Explanation:

d=42.5km=42500m

t=2.5hrs=2.5*60sec=150sec

s=d/t=42500/150= 283.33m/sec

Verified answer

Answer: Average Speed = 4.72 m/s

Explanation: Average Speed = [tex]\frac{Distance}{Time}[/tex]

Distance = 42.5 km

Time = 2.5 hour

Average Speed = [tex]\frac{42.5}{2.5}[/tex]

Average Speed = 17km/h

Now in m/s

17 * [tex]\frac{1000}{3600}[/tex] = 4.72 m/s

Average Speed = 4.72 m/s