Carts

Question:

Perhaps you have noticed the wheels of some carts—the front ones are smaller than the rear ones. Why do the front axles wear out faster than the rear?

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Answer: This is a typical example of a problem with geometrical basis, disguised by extraneous details. It is impossible to solve this problem without geometry.
The question is why does the front axle wear out faster than the rear. We know from Geometry that the circle with a smaller circumference has to make more revolutions than the bigger circle to cover the same distance. And, naturally, the wheel turns more often, and quicker the front axle wears out.

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