Circle Questions

A circular copper wire of radius $7\text{cm}$ is bent to form a rectangle. If the breadth and length of the rectangle are in the ratio of $4:7$ respectively, what is the breadth of the rectangle? (in $\text{cm}$)

A horse is tied to a post by a rope. If the horse moves along a circular path, always keeping the rope tight, and describes $88\text{m}$ when it traces $72^{\circ }$ at the centre, then the length of the rope is