The SA formula to find a right cone is area of the base x 1/2 (perimeter)(slant height)
To find the area of the base you do radius squared x pi
Radius=11
So 121pi is area of the base
Perimeter=circumference of the circle
So perimeter=24pi
So 121pi x 1/2 (12pi)(6)
12 x 6=72pi/2=36pi
121pi x 36pi= 4356pi
Answer: 4356pi
