Question

The radii of the circular ends of a solid frustum of a cone are 33 cm and 27 cm and its slant height is 10 cm. Find its total surface area.

Answer 1

Slant height of frustum cone, l = 10 cm 

Radii of circular ends of frustum cone: r’ = 33 cm and r’’ = 27 cm

Total surface area = π(r’ + r’’)l + πr’² + πr’’² 

= π(33 + 27)10 + π (33)² + π (27)² 

= 7599.42 cm²