Find the area of Circular Ring if outer diameter D= 38mm, inner diameter d=32mm
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Answer:
area of circular ring is [ outer area - inner area ]
pi*R^2 - pi*r^2
pi( R^2 - r^2 )
22/7(19^2 - 16^2)
22/7(105)
22*105/7
22*35
= 770 sq mm
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