A mountain bike tire completes 40 revolutions and travels 272 feet. Rounded to the nearest inch, what is the diameter of the bike's tire? Use 3.14 for pi.

Explanation:

When the tire does not slip, each revolution means that the bike advance a distance equal to the circumference of the tire.

Thus, when 40 revolutions are completed, the bike will advance a distance equal to 40 times the circumference of the bike:

The circumference is equal to:

Using π = 3.14:

Convert to inches: 1 feet = 12 inches:

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