so each 1 revolution it travels the distance around the rim of the wheele aka circumference circumference=pi times diameter diameter=21 circunference=pi times 21 or 21pi so distance=number of revolutions times circunference number of revolutions=3 subsitute
distance=3 times 21pi distance=63pi
answer is 63pi or aprox pi to 3.14 and do 63 times 3.14=197.82 aprox 197.82 inches
