Question

Please help me! I will metal and fan!
What are the lateral area and the surface area of the cone with a radius of 12 ft and a slant height of 21 ft? Round the answers to the nearest tenth.
A. LA= 452.4 ft^2; SA= 2,598.8 ft^2
B. LA= 452.4 ft^2; SA= 1,244.1 ft^2
C. LA= 791.7 ft^2; SA= 2,598.8 ft^2
D. LA= 791.7 ft^2; SA= 1,244.1 ft^2

Answer 1

the surface area of a cone = pi*r^2 + pi*r*l