Question 1071210
Two concentric circles. 

Inner circle:
{{{2pi*r=242}}}
{{{r=121/pi}}}


Outer circle's radius is  {{{121/pi+7}}}.



Area of the track is the difference between outer and inner circles' areas.
{{{pi(121/pi+7)^2-pi(121/pi)^2}}}


{{{pi((121/pi+7)^2-(121/pi)^2)}}}


{{{pi((121/pi+7+121/pi)(121/pi+7-121/pi))}}}


{{{pi((242/pi+7)(7))}}}


{{{pi(1694/pi+49)}}}


{{{highlight(1694+49pi)}}}