A solid is formed by attaching a hemisphere of radius to the base of a right circular…

MATHEMATICS · Single correct · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

A solid is formed by attaching a hemisphere of radius

7\,\text{cm}

to the base of a right circular cone of height

24\,\text{cm}

and the same radius. The flat circular base of the cone is left unpainted. Using

\pi = \dfrac{22}{7}

, determine the total curved surface area to be painted (in

\text{cm}^2

). (a)

1\,012\text{ cm}^2

(b)

704\text{ cm}^2

(c)

858\text{ cm}^2

(d)

836\text{ cm}^2