Task: Question Answering
Input (English): Problem: the speed of a boat in still water is 20 km / hr and the rate of current is 5 km / hr . the distance travelled downstream in 18 minutes is : 
Options: a ) 9.5 , b ) 5.5 , c ) 7.5 , d ) 6.5 , e ) 5.1
Output (English): c