A horse is tied to a 15 foot rope and there is a bail of hay 25 feet away from him. Yet the horse is able to eat from the bail of hay. How is this possible?
Answer
The rope isn't tied to anything, so the horse can go freely to anywhere it pleases.
Alternatively: the rope is tied to an unmovable post, and the horse and hay are on opposite sides of that post. The diameter of the horse's range of movement would be 30 feet.