Task: Question Answering
Input (English): Problem: water is poured into a tank so that the tank is being filled at the rate of 5 cubic feet per hour . if the empty rectangular tank is 10 feet long , 6 feet wide , and 5 feet deep , approximately how many hours does it take to fill the tank ? 
Options: ['a ) 40', 'b ) 45', 'c ) 50', 'd ) 55', 'e ) 60']
Output (English): e