Question 1104854
Area for both the rectangle and the circle:  {{{25pi^2}}}


The circle, area using radius r:
{{{pi*r^2=25pi^2}}}

{{{r^2=25pi^2/pi}}}

{{{r^2=25pi}}}

{{{r=5*sqrt(pi)}}}


The diameter of the circle is twice r.
{{{highlight(d=2r=10*sqrt(pi))}}}