Question

what is the formula of total surface area of a right circular cone

Answer 1

Total surface area of a right circular cone=area of base+area of curved surface area.

Area of base=πr^2 where r is the radius of cone.
For curved surface area see the picture given by me,
Here l is slant height.
Curved surface area is =πrl..

So total surface area is=πr^2+πrl

Thanks.
Tripathy.