Formula for volue of cylinder is area time height. Lets find area
A=[tex] \pi r^2[/tex]
diameter=2r
8=2r
r=4
Now substitute r to [tex]A= \pi r^2[/tex]
A=[tex] \pi 4^2= 16\pi [/tex]
Now we have formula
V=[tex]16 \pi *height=16 \pi *9=144 \pi [/tex] - its the result, so B
