If the circumference of the base of a solid right circular cone is 236 cm and its slant height is 12 cm , find its curved surface area.
Given,
Slant height of the cone l=12 cm
Let, radius of the base be
rCircumference of the base of cone =236 cm
⇒2πr=236
⇒πr=118.......(1)
Curved surface area of cone =πrl =118×12 sq.cm =1416 sq.cm
Hence, the required curved surface area is 1416 sq.cm .