d=12

h=18
What is the lateral surface area of the cylinder?
A.12 pi cm
B.18 pi cm
C.216 pi cm
D.288 pi cm

216 pie cm^2

circumference * height

pi d h

A=2πrh

Visualize opening up the cylinder, you would see:

2 circles + 1 rectangle

SA = 2π r^2 + (2πr)(h)
= .....

you have all the values, if diameter = 12 , r = 6

I didn't consider that "lateral" could exclude the 2 circles.

Would the answer be C then?

I thought that is why they said lateral :)