Answer:
53.2mph
Step-by-step explanation:
The average rate of travel is total distance traveled over total time.
[tex]Average\:Rate=\frac{Distance}{Time}[/tex]
Total distance is 239.4 miles
Total time is 1:40pm-9:10am=13hrs:40mins-9hrs:10mins=4hrs:30mins or 4.5hrs
[tex]Average\:Rate=\frac{239.4}{4.5}mph=53.2mph[/tex]