Question 1084974
{{{A[walk]=(pi/4)((240+12)^2-240^2)}}}
{{{A[walk]=(pi/4)(252^2-240^2)}}}
{{{A[walk]=(pi/4)(5904)}}}
{{{A[walk]=1476pi}}} {{{ft^2}}}
{{{A[walk]=(1476pi)/9}}}
{{{A[walk]=164pi}}}{{{yd^2}}}