Question

The diameter of a cone is $14$cm and its slant height is $10$cm. Find its curved surface area.

Answer 1

Given, Diameter $d=14cm$
$\therefore r=\frac{14}{2}=7cm,l=10$cm
Curved surface area of a cone$=\pi rl=\frac{22}{7}\times 7cm\times 10cm=220c{m}^2$.