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If  is the radius and  is the height of the frustum, then
(i) Volume of the frustum of the circular cylinder
i.e. 
(ii) Curved surface area of the frustum
(iii) Total surface area = curved surface area + area of the ends
Example:
A circular cylinder, having a radius 2.3m, is cut in the shape of a frustum with . Find the volume and the lateral surface area.
Solution:
(a) 
(b) Curved surface area 
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