5% is pretty steep, I wouldn’t be surprised if one could reach 30 kph without pedaling at all.
Technically you can reach that with any amount of drop per distance where the speed gain exceeds drag as long as you don’t specify how long the incline is.
Technically you can reach that with any amount of drop per distance where the speed gain exceeds drag as long as you don’t specify how long the incline is.
That’s the question.