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Printjmc
prealgebra senior
Problem
A housefly sits on the outer edge of a rotating circular ceiling fan with a diameter of 6 feet. The fan rotates constantly at a rate of 20 revolutions per minute. How many minutes had the housefly been on the fan during the time it took to travel feet? Express your answer to the nearest whole number.
Solution
A ceiling fan with a diameter of 6 feet has a circumference of feet. If the fly traveled feet, then it must have made revolutions. Since the fan rotates 20 times per minute, that's minutes, or about , to the nearest whole number.
Final answer
162\text{ minutes}