The equations are
,
and
.
Shell method:
\Vertical axis of revolution.
\The volume of the solid is
.
The distance from the center of the rectangle to the axis of revolution is
.
Find the limits of integration by solving point of intersection:
\
and
.

.
Limits are
.
The height of the rectangle is
.
Substitute
,
and
in
.
.
Evaluate
using substitution method.
Let
.


.
If
, then
.
If
, then
.
If
, then
.

.
.