Bill and Johnny each drove to a location 30 miles away and back to their starting point by the same route. 60 mile total each car.
Bill drove 60 miles per hour for the trip. Johnny however drove 90 mph to the turnaround point and due to car problems could only go 30 mph on the return trip. Who got back first?
Bill would make it back first. One’s intuition would be they would get there at the same time but that is wrong.