$\"\"$

Height of the cylindrical shell is $\"\"$ cm.

Radius of the cylindrical shell is $\"\"$ cm.

Thickness of the each shell is $\"\"$ cm.

Volume of the cylindrical shell is $\"\"$ .

Differentiate on each side with respect to $\"\"$ .

$\"\"$

Substitute corresponding values in the above expression.

$\"\"$

Volume is $\"\"$ .

$\"\"$

$\"\"$ .