Landscaping Sam has a fountain in his backyard. He has decided to make a bed of flowers around the...

Landscaping Sam has a fountain in his backyard. He has decided to make a bed of flowers around the fountain in the shape of a disc with diameter 6 feet. As a border around the bed, he is going to place shrubs around of it and a stone border around the remaining part. How many feet of stone border does he need?

 

The latitude of a point P on the surface of Earth is defined as the angle formed by a ray from P to C, the center of Earth, and a ray from C to the equator. Latitude is measured from the equator, with values going north or south.