Answer:
Option C
Step-by-step explanation:
Given in the picture is a right circular cone with base radius = 3 units and length = 15 units.
We have to find the surface area of the cone.
The total surface area of the cone is the sum of base area + lateral surface area
Base area = area of a circle = [tex]\pi r^2[/tex]
Lateral area of cone = [tex]\pi rl[/tex] where l = length of the cone.
Hence total surface area
= [tex]\pi r (r+l)\\=\pi (3)(3+15)\\=54\pi[/tex] square units
Option C is the answer.
