Posted by **Sandy** on Tuesday, September 11, 2012 at 6:45pm.

A Ford Focus goes about 2 meters down the road for each revolution of its tires, which, when new, have treads about 1 centimeter thick. If it goes 80,000 km (50,000 mi) before its tread is gone, find the average thickness of tire lost durin each revolution. Compare this thickness to the diameter of the smallest of atoms, and discuss.

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