Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area
Radius (r) of the base of cone = 
= 5.25 cm
Slant height (l) of cone = 10 cm
CSA of cone = πrl
= 
* 5.25 * 10
= 22 * 0.75 * 10
= 165 cm2
Therefore, the curved surface area of the cone is 165 cm2
22