Task: Question Answering
Input (English): Problem: two train each 500 m long , are running in opposite directions on parallel tracks . if their speeds are 45 km / hr and 30 km / hr respectively , the time taken by the slower train to pass the driver of the faster one is ? 
Options: a ) 20 s , b ) 24 s , c ) 22 s , d ) 23 s , e ) 21 s
Output (English): b