Question 315147
{{{R2=R1+1}}}
.
.
{{{A1=pi*R1^2}}}
{{{A2=pi*R2^2}}}
.
.
{{{A2=A1+5}}}
{{{pi*(R1+1)^2=pi*R1^2+5}}}
{{{R1^2+2R1+1=R1^2+5/pi}}}
{{{2R1+1=5/pi}}}
{{{2R1=5/pi-1}}}
{{{highlight_green( R1=5/(2pi)-1/2)}}}
Then
{{{R2=R1+1}}}
{{{highlight_green( R2=5/(2pi)+1/2)}}}