Task: Question Answering
Input (English): Problem: the ratio of the volumes of two cubes is 6859 : 1331 . what is the ratio of their total surface areas ? 
Options: a ) 1 : 21 , b ) 12 : 7 , c ) 1 : 15 , d ) 21 : 17 , e ) 13 : 13
Output (English): b