An automobile tire is rated to last for 60,000 miles. to an order of magnitude, through how many revolutions will it turn?

Question

asked Apr 19, 2019 115k views

1 Answer

Stiven · Answer 1 · 2019-04-23T07:34:48+0000

Let the average diameter of the automobile tire is about 2 feet. Therefore its circumference is
$2 feet* \pi =6.29 feet$ .

Now we have to convert an automobile tire is rated to last for 60,000 miles in to feet.

As
1 miles =5280 feet .

So,
60000 miles = 60000* 5280 feet =316800000 feet

Thus the number of revolutions,

$(316800000 feet )/(6.29 feet) =50365659.8 revolutions \\\\=5.0*10^7 rev$

Hence, order of magnitude of revolutions is 7.