Question 54763
{{{A = pi*r^2}}}
{{{r^2 = A/pi}}}
{{{r = sqrt(A/pi)}}}

Here A = 113.04 sq.ft. Also {{{pi = 3.14}}}.
So, {{{r = sqrt(113.04/3.14)}}}
or {{{r = 6}}}

Thus reqd. value of r is 6 ft.