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Annulus
Problem
A circle has a unit circle (radius, r = 1) removed from its centre to produce an annulus.
If the area remaining is the same as the unit circle removed, find the width of the annulus.
Problem ID: 159 (Mar 2004) Difficulty: 2 Star
A circle has a unit circle (radius, r = 1) removed from its centre to produce an annulus.
If the area remaining is the same as the unit circle removed, find the width of the annulus.
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