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 19404pi feet? Express your answer to the nearest whole number.

Guest Feb 22, 2017

#1**0 **

Ditance traveled in one minute =

pi * 6 * 20 = 120pi

So

19404 pi / 120 pi =

19404/120 = about 161.7 minutes = 162 min

CPhill
Feb 22, 2017

#2**0 **

wow, how do you do that Chris? I don't even know what any of that means!

MysticalJaycat
Feb 22, 2017