An 18-wheeler is traveling on the turnpike at a speed that is 8 miles per hour faster than a rental truck During the same period of time the 18-wheeler travels 220 miles and the rental truck travel?

72 mph

HOW FAST IS THE 18-WHEELER GOING?!

Well, lets see. Since the rental is slower than the 18-wheeler by 8 mph, we'll add 8 to 72. This gives us 80 mph.

so 80 mph is the speed of the 18-wheeler, while the rental is 72 mph.