SOLUTION: A circular wall is 0.500 meter thick and has an inside diameter of 10.20 meters. Find the cross-sectional area of the wall. Round the answer the the nearest tenth square meter.

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Question 1197332: A circular wall is 0.500 meter thick and has an inside diameter of 10.20 meters. Find the cross-sectional area of the wall. Round the answer the the nearest tenth square meter.
Answer by ikleyn(52781) About Me  (Show Source):
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Inside radius is  r = 10.20/2 = 5.10 meters.


Outside radius is R =  5.10 m + 0.5 m = 5.6 m.


Cross-sectional area is  pi%2AR%5E2+-+pi%2Ar%5E2 = 3.14%2A5.6%5E2+-+3.14%2A5.1%5E2 = 16.7 m^2.    ANSWER

Solved.