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by sanju09 » Sun Apr 11, 2010 11:51 pm
The end of a blade on an airplane propeller is 10 feet from the center. If the propeller spins at the rate of 1,320 revolutions per second, how many miles will the tip of the blade travel in one minute? (1 mile = 5,280 feet)
(A) 200Ï€
(B) 240Ï€
(C) 300Ï€
(D) 480Ï€
(E) 1,200Ï€
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by thephoenix » Mon Apr 12, 2010 12:27 am
its 20*pi*1320*60/5280=300pi
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