Task: Question Answering
Input (English): Problem: if 9 gallons of gasoline are added to a tank that is already filled to 3 / 4 of its capacity , the tank is then filled to 9 / 10 of its capacity . how many gallons does the tank hold ? 
Options: a ) 20 , b ) 24 , c ) 36 , d ) 40 , e ) 54
Output (English): e