SOLUTION: an 18-foot diameter circular garden has a 4- foot wide walk around it. What is the area of the walk

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Question 431134: an 18-foot diameter circular garden has a 4- foot wide walk around it. What is the area of the walk
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Subtract the outer circle from the inner circle
+A+=+pi%2A%2822%2F2%29%5E2+-+pi%2A%2818%2F2%29%5E2+
+A+=+pi%2A%28484%2F4%29+-+pi%2A%28324%2F4%29+
+A+=+%28pi%2F4%29%2A%28484+-+324%29+
+A+=+%28pi%2F4%29%2A160+
+A+=+40%2Api+
+A+=+125.664+ ft2