how to find radius of outer boundary of circle???plese explain
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The area of a circular ring bounded by two concentric circle of radii R and r (R > r)
= area of the bigger circle – area of the smaller circle
= πR2 - πr2
= π(R2 - r2)
= π(R + r) (R - r)
Therefore, the area of a circular ring = π(R + r) (R - r), where R and r are the radii of the outer circle and the inner circle respectively.
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Answer:
Area of a Circular Ring
= πR2 - πr2.
= π(R2 - r2)
The outer diameter and the inner diameter of a circular path are 728 m and 700 m respectively. ...
The outer radius of a circular path R = 728m2 = 364 m.
The inner radius of a circular path r = 700m2 = 350 m.
The inner radius of a circular path r = 630m2
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