Advanced Rate Problems

Question

A car takes 9 hours to travel in one direction between two cities that are 600 miles apart. If the return trip along the same path takes 11 hours, what is the average speed of the car for the entire round trip?

Answer 1

distance=rate*time

total distance=rate*total time

1200=rate*20

rate=1200/20

rate=60 mph is the average speed for the round trip