The average speed is 52.6 miles/hour.
Step-by-step explanation:
Given,
The distance (D) = 389.24 miles
Time (T) = 7.4 hours
To find the speed
Formula
Distance = Speed × Time
Now,
Speed = [tex]\frac{Distance}{Time}[/tex]
= [tex]\frac{389.24}{7.4}[/tex] miles/ hour
= 52.6 miles/ hour
Hence, the average speed is 52.6 miles/hour.