#64 Ruritanian carpet
The newly built reception room at the Ruritanian embassy is circular. In the middle, there is a large circular pillar. All very stylish, but now it needs to be carpeted. Of course, the carpet will need to be doughnut shaped, with a hole in the middle where the pillar is. Fernando the carpet fitter needs to know the area he has to cover. This would be easy if he knew the radius or diameter of both circles, but nobody seems to know where the plans are, and when he tries to measure the diameter of the room,…
