#166 An automobile tire is rated to last for 40,000

An automobile tire is rated to last for 40,000 miles - Physics

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An automobile tire is rated to last for 40,000 miles. To an order of magnitude, through how many revolutions will it turn?
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Free Chegg Answer

All you have to do is estimate the circumference of the tyre and divide 40000 miles by that. Let's say the tyre is 20 inches in diameter, i.e. ~50cm, giving a circumference of around 1.5m. 1 mile = 1650m so 40000 miles is 66 million metres. Divide by 1.5 and you get around 44 million revs, so an order of magnitude estimate would be 10^7. I hope this helps.