Question 808317
What is the ratio of the volume of the hemisphere to that of the cylinder. 
:
we know the height of the cylinder = r also
Hemisphere:cylinder ratio
{{{2/3}}}{{{pi*r^3}}}
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{{{pi*r^2*r}}}
which is
{{{2/3}}}{{{pi*r^3}}}
--------
{{{pi*r^3}}}
Cancel {{{pi*r^3}}}
{{{(2/3)/1}}} = The ratio 2:3