Question

The height of a cone is 8 cm and its base radius is 6 cm. The curved surface area the cone is (Use $\pi$ = 3.14).

Answer 1

Here, h= 8cm and r= 6cm. So, from $l^2=h^2+r^2$, we have

$l^2={12}^2+5^2$, l = 13 cm So, curved surface area = $\pi$rl

= $3.14\times 5\times 13{cm}^2=204.1{cm}^2$