How many feet does a wheel with a diameter of 18 inches travel in 9 revolutions?

***can someone please help explain this to me because when my teacher tried to explain this to me earlier I still never understood it please help me***

4 answers

the circumference (distance around the wheel) is ... diameter * π

the wheel rolls on the circumference
... so it travels one circumference for each revolution

travel = diameter * π * revolutions

12 inches in a foot
Thank you
wtf
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