Question 1156268
x by x, the original square
Area  {{{x^2}}}.



Increased:
Area now  {{{(x+6)(x+8)=239.25}}}

{{{x^2+14x+48-239.25=0}}}

{{{x^2+14x-191.25=0}}}

{{{x=(-14+sqrt(196+4*191.25))/2}}}

{{{x=(-14+31)/2}}}

{{{highlight_green(x=8.5)}}}
The question asks for the sum of four of these.
Perimeter of original square, 34 feet.