Question 292041
Cylinder volume is {{{pi* r^2 h}}}
So the ratio varies as {{{r^2 h}}}
{{{(4/5)^2 * (5/6)}}}
{{{(4/5) * (4/5) * (5/6)}}}
{{{(4*4*5)/(5*5*6)}}}
{{{16/30}}}
{{{8/15}}}

 ratio of 8:15