Task: Question Answering
Input (English): Problem: the ratio of the volumes of two cubes is 729 : 125 . what is the ratio of their total surface areas ? 
Options: a ) 81 : 21 , b ) 81 : 22 , c ) 81 : 24 , d ) 81 : 25 , e ) 81 : 29
Output (English): d