Area of an annulus

How to calculate the area of an annulus, with example

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Area of an annulus or pipe
How to find the area of an annulus

The area = π x (Outer Radius 2 – Inner radius 2)

Example:

π = 3.14

Outer Radius = 10 cm

Inner radius = 8 cm

Area = 3.14 x(102 – 82)

ANSWER : 113 cm2

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