I was going, not to St Ives, but to Port Elizabeth (from Grahamstown) this morning. I saw a road sign that said it was 100km to PE. For some reason I caught sight of my speedometer and saw I was doing 120km. No hang on, that's the distance to PE, not the speed limit. Imagine if when we travelled and the distance was 100km we had to travel at 100km/h - and always do the same speed as the distance. So that by the time we were 5km from PE we would have to do 5km/h. Would I ever get to PE?
And for an extra point, express the problem mathematically.