Task: Question Answering
Input (English): Problem: the speed at which a man can row a boat in still water is 20 kmph . if he rows downstream , where the speed of current is 4 kmph , what time will he take to cover 80 metres ? 
Options: a ) 10.51 , b ) 11.51 , c ) 9.51 , d ) 13.51 , e ) 15.51
Output (English): a