The diameter of each wheel of a bus is 84 cm how many revolotions per min must a wheel in order to move at 39.6kmperh
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v=39.6×1000/60=660mpermin
x=84×10^-2
rev.=v×x=660×84×10^-2=554.5
x=84×10^-2
rev.=v×x=660×84×10^-2=554.5
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