$\"\"$

The equations are $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ .

The volume of the solid generated revolving about the $\"\"$ -axis.

Disk method:

$\"\"$ .

Integral limits are $\"\"$ and $\"\"$ .

Substitute $\"\"$ , $\"\"$ , $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$

$\"\"$ .