Two cars with new tires are driven at an average speed of 60 mph for a test drive of 2000 miles. The diameter of the wheels of one car is 15 inches. The diameter of the wheels of the other car is 16 inches. How many revolutions does each tire make?
First notice that the average speed has no affect on the solution. No matter if the cars are traveling at 60mph or 100mph they still travel 2000 miles. ...
This shows how to find the number of revolutions a tire completes in a given situation.