SOLUTION: “Three concentric circles have radii of a, 2a, and 3a. Find the area of the outer ring and the middle ring.” I think the outer area is A=pi(3a)^2 and the middle area is A=pi(2a)^2,
Question 1107007: “Three concentric circles have radii of a, 2a, and 3a. Find the area of the outer ring and the middle ring.” I think the outer area is A=pi(3a)^2 and the middle area is A=pi(2a)^2, but I’m not very sure. Answer by ikleyn(52908) (Show Source): You can put this solution on YOUR website! .
The area of the outer ring is the difference
A = - = = .
The area of the middle ring is the difference
A = - = = .