Philip P. answered • 08/05/17

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Remember that the circumference of the wheel is pi·d where d is the wheel's diameter. Every time the wheel makes one complete turn, the bicycle moves one circumference forward. So if the wheel turns n times, it moves n circumferences:

**distance = n·pi·d**

- n = number of times the wheel turns = 47
- pi = 3.14
- d = diameter of wheel
- distance = 188 ft

distance = n·pi·d

188 ft = 47·(3.14)·d

Solve for d. Round your answer to 2 decimal places. The units are feet. Multiply by 12 to convert to inches (if you want).