Task: Question Answering
Input (English): Problem: the end of a blade on an airplane propeller is 10 feet from the center . if the propeller spins at the rate of 1,980 revolutions per second , how many miles will the tip of the blade travel in one minute ? ( 1 mile = 5,280 feet ) 
Options: a ) 200 π , b ) 450 π , c ) 300 π , d ) 480 π , e ) 1,200 π
Output (English): b