Consider the Region Between the Graphs Of $f ( x ) = x ^ { 2 }$

Multiple Choice

Consider the region between the graphs of $f ( x ) = x ^ { 2 }$ and $g ( x ) = 3 x$ on the interval [0, 3].
-Use disk/washer method to construct definite integrals to find the volume of the solid that is obtained by revolving this region around the vertical line x = 4.

A) 12.5 $\pi$
B) 20.5 $\pi$
C) 18.5 $\pi$
D) 22.5 $\pi$