Question 964103
volume of cylinder, {{{16*pi*5^2}}};
volume of cone, {{{(1/3)12*pi*4^2}}};


Cylinder seems bigger.  Space in cylinder not part of cone space is
{{{pi(16*5^2-(1/3)12*4^2)}}}
{{{pi(16*5^2-4*4^2)}}}
{{{4^2*pi(5^2-4)}}}
{{{16*pi(21)}}}
{{{highlight(336pi)}}}, the empty air space between cone and cylinder inside the cylinder.