Matt
secondary
student

A car is traveling from point A to point B. Point A and point B are 30 miles apart. A car travels 30 miles an hour from point A to point B and then goes back to point A. How fast does the car have to go back to average 60 miles an hour?

Well, let's see... the total distance from A to B and back is 60 miles. The car already took an hour to go from A to B. So, no matter how fast he goes from B to A, he will have traveled 60 miles in more than one hour.