Task: Question Answering
Input (English): Problem: two train each 500 m long , and running in opposite directions on parallel tracks . their speeds are 45 km / hr and 30 km / hr respectively . find the time taken by the slower train to pass the driver of the faster one . 
Options: a ) 20 sec , b ) 25 sec , c ) 24 sec , d ) 30 sec , e ) 22 sec
Output (English): c