Question 336053
{{{v=1/(6ab(x+y))}}} 
{{{ 6ab(x+y) = 1/v}}}
divide by 6ab on both sides
{{{(cross (6ab)(x+y))}}}*{{{1/cross(6ab)}}} = {{{1/(6abv)}}}
{{{ x+y = 1/(6abv)}}}
add -y to both sides
{{{x+y-y = (1/(6abv))-y }}}
{{{ x= (1-6abvy)/6abv}}}
....
v= pi*h^2(r-h/3) 
{{{v/(pi*h^2) = r-(h/3)}}}
{{{(v/(pi*h^2))+h/3 =r}}}