# Answer on Mechanics | Relativity Question for nick

Question #5078

The warranty on a new tire says that an automobile can travel for a distance of 102,000 km before the tire wears out. The radius of the tire is 0.35 m. How many revolutions does the tire make before wearing out?

Expert's answer

The length of tire circumference is L = 2πr = 2*3.14*0.35 = 2.198 m. So, the tire makes

N =& 102000*1000/2.198 = 46405823,5 revolutions before wearing out.

N =& 102000*1000/2.198 = 46405823,5 revolutions before wearing out.

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