Asked by karleen
a pond surface has a diameter of 200 ft. around it is a walkway of 10 ft. what would be the area of the walkway?
Answers
Answered by
MathMate
Area of annulus (ring of width R-r)
= π(R^2-r^2)
R=external radius
r=internal radius
= π(R^2-r^2)
R=external radius
r=internal radius
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