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28 July, 08:37

What is the linear velocity in miles per hour of the tip of a lawnmower blade spinning at 2400 revolutions per minute in a lawnmower that cuts a path that is 26 inches wide?

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  1. 28 July, 09:00
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    Circumference is 2 (pi) r, since the path is 26in wide, the radius is 13in. C=26 (pi) = 81.68in. So the tip travels the circumference 2400 times in one minute, which is equal to 196035.4in per min. this is equal to 185.64mph.
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