Question 883858
The circumference of the wheel is {{{ C = 2*pi*r }}}
{{{ r - pi }}}
{{{ C = 2*pi^2 }}}
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In 6 revolutions, the wheel traces out 6 times
it's circumference, so
Straight line distance traveled = 
{{{ 6*2*pi^2 = 12*pi^2 }}}