Find the curved surface area of a cone with base radius 5.25 cm and slant height 10 cm.
Question:

Find the curved surface area of a cone with base radius 5.25 cm and slant height 10 cm.

Solution:

It is given that:

Base radius of the cone (r) = 5.25 cm

Slant height of the cone (l) = 10 cm

Curved Surface Area (C. S. A) = πrl

$=22 / 7^{*} 5.25 * 10=165 \mathrm{~cm}^{2} .$

Therefore the curved surface area of the cone is $165 \mathrm{~cm}^{2}$