circumference * height
pi d h
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
7 answers
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
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 :)
216 pie cm^2
1 answer