Question

Find the curved surface area of a cone of base radius r and height h?

Answer 1

Correct Question:-

• The curved surface area of a cone of slant height l and radius r is given by

Answer:-

• $\implies \: \pi \: rl$

Explanation:-

Let us consider the given slant height l and radius = r of the cone,

Curved surface area=(Arc length of sector/Circumference of circle)×Area of circle Curved surface area.

$\\ \implies \sf \: \dfrac{2\pi \: r}{2\pi \: l} i\times \pi {l}^{2} \\ \\ {\implies{ \red{ \boxed {\sf {\:\pi rl}}}}}$