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Radii of circular ends of a solid frustum off a cone re 33cm and 27cm and its slant height are 10cm. find its total surface area?

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Given slant height of frustum cone = 10cm 

Radii of circular ends of frustum cone are 33 and 27cm

 r1 = 33cm ;  r2 = 27cm.

Total surface area of a solid frustum of cone

Total surface area of frustum cone = 7599.42cm2

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