Originally Posted by
chinarider
But it doesn't; You'll spend a lot more time going up than down. If you go up a 1 mile hill @ 10 mph, it will take 6 minutes. If you then turn around and go down at 30 mph, it will only take 2 minutes.
On a theoretical hill yes. But the real world may get in the way! Sharp curves or traffic control devices may limit safe downhill speeds. (This is even more true on speedskates that effectively have no brakes)