Answer:
Surface area of cone is [tex]502.4\ ft^2[/tex]
Step-by-step explanation:
Given:
radius of a cone (r) = 8 feet
slant height of cone (l) = 12 feet
We need to find the surface area of cone.
Total surface area of cone = Area of circle [tex]+[/tex] Area of curved surface
Now we know that,
Area of circle = [tex]\pi r^2[/tex]
Area of curved surface = [tex]\pi rl[/tex]
Hence Total surface area of cone = [tex]\pi r^2+\pi rl=\pi r(r+l) = 3.14 \times 8 (8+12)=3.14\times8\times20= 502.4 \ ft^2[/tex]
Surface area of cone is [tex]502.4\ ft^2[/tex].
