Given:
Radius of small circle = 4 in.
Width of gray border = 2 in.
To find:
The area of the gray border.
Solution:
We have, radius of small circle:
The width of gray border is 2 in. So,t he radius of the larger circle is:
Now, area of gray border is the difference for area of larger circle and smaller circle.
Substituting in the above formula, we get
The area of the gray border is square inches. Therefore, the correct option is D.