27 Oct '16 14:03

A farmer owns a circular field which has a radius of 20m.

He wishes to tether a goat to a post on the edge of the field (ie, the circumference of the circle) with a rope so that the goat will have access to exactly half of the field.

How long should he make the rope?

He wishes to tether a goat to a post on the edge of the field (ie, the circumference of the circle) with a rope so that the goat will have access to exactly half of the field.

How long should he make the rope?