Question 1115449
In one revolution, the rider travels one circumference {{{ 2*pi*r }}} or {{{ pi*d }}},  where d is the diameter:
{{{ C = pi*d = pi*80}}} ft

Ten revolutions is therefore  {{{ 10*pi*80 = 800pi }}} ft,  which is approx. 2513.3ft.  (a little less than 1/2 mile)