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120 turns = 120 revolution = 2pi rad

s=r*theta=18*(120*2pi) = 4320 cm
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18 cm radius so circumference of the circle is needed so Circumferencei = pi x r squared so the answer is 122,083.2 cm squared so the tire covered in cm only is 12,208,320 cm
It will go as far as 13564.8 cm.
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