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What is the area between two concentric circles having diameters 10 and 18 meters?
Wiki User
∙ 13y ago
For a circle, A = pi*r2 where A is the area and r the radius. For an anuulus, A = pi*(R2 - r2) where R is the outer radius and r the inner radius. So, A = pi*(182 - 102) = 703.717 (to 3 dp)
Wiki User
∙ 13y ago
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