Task: Question Answering
Input (English): Problem: two airplanes fly the same exact route from atlanta to chicago . plane a flies 200 mph while plane b flies 300 mph ( assume that simple model versus actual acceleration / deceleration near the airports ) . if plane a took off exactly 40 minutes before plane b , after how many minutes will plane b overtake plane a ? 
Options: a ) 65 , b ) 80 , c ) 90 , d ) 115 , e ) 120
Output (English): b