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?

Question

mertsj · Answer

The radius of the circle is 13.  Find its circumference.

anonymous · Answer

approx 
81.7

mertsj · Answer

It goes around 2400 times each minute and travels 81.7 inches each time around.  How far does it go in 1 minute?

anonymous · Answer

26 in
??

mertsj · Answer

if it goes 81.7 inches in 1 revolution it goes 81.7(2400) in 2400 revolutions.

anonymous · Answer

so 196080 is what i got

mertsj · Answer

And that is 296080 inches in 1 minute.

mertsj · Answer

So now we have to convert that to miles per hour.  Can you do that?

anonymous · Answer

280.4mph

mertsj · Answer

I got 185.6 mph.  I made a typo up there.  Your number was right 196080 inches in 1 minute.

mertsj · Answer

Do it again...se if I am right or not.

anonymous · Answer

yes thank u!

mertsj · Answer

yw