Question

Find the curved surface area of a cone with base radius 5.25 cm and slant height 10 cm.

Answer 1

The radius r of the cone = 5.25 cm and slant height l = 10 cm,

The Curved Surface Area (CSA) of a cone =$\pi \times r\times l$

=$\frac{22}{7}\times 5.25\times 10$

= $22\times 0.75\times 10$

= 165 square cm

${165}^2$ is the CSA of a cone.