Task: Question Answering
Input (English): Problem: two goods trains each 500 m long are running in opposite directions on parallel tracks . their speeds are 60 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 ) 12 sec , b ) 24 sec , c ) 40 sec , d ) 60 sec , e ) 62 sec
Output (English): c