Question

What is the surface area of the cylinder in terms of Pi?

(A picture of a cylinder with 11in as its radius and 23 in as its height)

A)748pi in^2
B)627pi in^2
C)506pi in^2
D)242pi in*2

(I'm not sure how to do this,I did it before and got it right but I lost my notes) but I think we don't multiply with pi do we? I need help. Can someone re teach me how to do this

Answer 1

two ends with total area 2pi r^2
curved side with area 2pi r h
area = 2pi*r(r+h) = 748pi

Answer 2

SA - 2 * pi * r^2 + 2 * pi * r

http://www.mathopenref.com/cylinderareamain.html