Question

What is the surface area of a cylinder with a height of 7 and a radius of 9 with half a sphere attached?

Answer 1

for a cone surface area is:
A=pi*r^2+pi*r*sqrt(h^2+r^2))

for a sphere, the surface area is 4pi*r^2

so you have half a sphere and a cone without a base (the half sphere is on the base of the cone)

all you have to do is find the surface area of the cone minus its base (SA_cone - Area of a circle) and add half of the surface area of a sphere.

that leaves you with SA = pi*r*sqrt(h^2+r^2) + (4*pi*r^2)/2

I'll let you finish from there

Answer 2

lol i know the answer but i just wanted someone to try it and it was my 1st question asked

Answer 3

gotcha

Answer 4

thank you for helping me though it reminded me of a few things i messed up