Question

find the curved surface area of a cone with base radius 5.25 cm slant height 10 cm

Answer 1

$\text{base radius, r} = 5.25\ cm\\ \\ \text{slant height, l} = 10\ cm\\ \\ \text{Curved surface area of cone is given as}\\ \\ \text{CSA of cone}= \pi rl \\ \\ = \pi \times 5.25 \times 10 \\ \\ = \boxed{164.93 \: {cm}^{2} }$