Volumes and surface areas of frusta of pyramids and cones

For the frustum of a cone shown in Figure 36.1: Figure 36.1 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429294402/968186b9-ffa4-4f2b-aa54-7fc58a604561/content/fig36_1.tif"/> Volume = 1 3 πh ( R 2 + Rr + r 2 ) Curved surface area = πl ( R + r ) Total surface area = πl ( R + r ) + πr 2 + πR 2 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429294402/968186b9-ffa4-4f2b-aa54-7fc58a604561/content/eq1419.tif"/>