Task: Question Answering
Input (English): Problem: one pipe can fill a tank three times as fast as another pipe . if together the two pipes can fill the tank in 36 minutes , then the slower pipe alone will be able to fill the tank in ? 
Options: a ) 144 min , b ) 250 min , c ) 196 min , d ) 100 min , e ) 112 min
Output (English): a