A shuttle cock used for playing badminton has the shape of a frustum of a cone mounted on a
Channel: Doubtnut
Date: 2020-01-19

A shuttle cock used for playing badminton has the shape of a frustum of a cone mounted on a hemisphere. The diameters of the ends of the frustum are 5 cm and 2 cm; the height of the entire shuttle cock is 7 cm. Find the external surface area.