Question

I'm not sure how to solve this problem. I get none of the answers

Answer 1

Area of base = 9pi
curve surface area = 3*pi*15=45pi
total area 54pi
i guess the n here represents pi the answer would just be a since its the most relevant

Answer 2

surface are of a cone = (pi)r(r + l)
r=3, l=15 ... n is not needed
what's n anyway?