Task: Question Answering
Input (English): Problem: a boats man can row in still water at speed of 7 km / hr . it takes 6 hours more to travel the same distance in upstream than in downstream if the speed of the river is 3 km / hr . what is the distance between the two destinations ? 
Options: a ) 40 , b ) 87 , c ) 126 , d ) 18 , e ) 91
Output (English): a