Task: Question Answering
Input (English): Problem: how many seconds will a 400 metre long train take to cross a man walking with a speed of 3 km / hr in the direction of the moving train if the speed of the train is 63 km / hr ? 
Options: a ) 24 , b ) 30 , c ) 40 , d ) 45 , e ) 50
Output (English): a