Asked by jordy
Your town is building a circular ice rink with a diameter of 100 feet. Around the ice rink will be a walkway that is 10 feet wide. What is the approximate area of the walkway?
Answers
Answered by
Steve
the area of the walkway is the whole area minus just the rink, so that's
πR^2-πr^2 = π(R^2-r^2) = π((50+10)^2-50^2) = π(60^2-50^2) = π(3600-2500) = 1100π ft^2
πR^2-πr^2 = π(R^2-r^2) = π((50+10)^2-50^2) = π(60^2-50^2) = π(3600-2500) = 1100π ft^2
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