need help with word problem

The Parks Department is planting a circular garden in the city park. The diameter of the garden is 10 feet. The concrete mowing strip is around the garden is one foot wide. What is the area of the mowing strip?
A= 3.14 x 6 square -radius is 6,half of diameter of 12
Is the correct set-up?

1 answer

Ag + As = At
As = At - Ag
As = 3.14*6^2 - 3.14*5^2 = Area of strip.

At = Total area.
Ag = Area of garden.