Let V Be the Volume of the Solid Generated by Revolving

Multiple Choice

Let V be the volume of the solid generated by revolving the region bounded above by $y = \sqrt { \cos x }$ and bounded below by the x-axis from x = 0 to $x = \frac { \pi } { 2 };$ about the x-axis. Then V is

A) $\pi$
B) $\frac { 3 \pi } { 2 }$
C) $2 \pi$
D) $\frac { 5 \pi } { 2 }$
E) $3 \pi$