Question

The radius of the base of a cone is $14cm$ and its slant height is $50cm$. Find the curved surface area and total surface area of the cone.

Answer 1

Given:
The base radius of cone $\left(r\right)=14cm.$
Slant height (I) $=50cm$:.
Curved surface area of cone = $\pi rl=\frac{22}{7}\times 14\times 50$
$=2200{cm}^2$
And total surface area of cone $=\pi r(1+r)$
$=\frac{22}{7}\times 14\times (50+14)$
$=22\times 2\times 64$
$=2816{cm}^2$
Hence, curved surface area $2200{cm}^2$ and total surface area $=2816{cm}^2$