Task: Question Answering
Input (English): Problem: an woman sitting in a train which is travelling at 20 kmph observes that a goods train travelling in a opposite direction , takes 15 seconds to pass him . if the goods train is 300 m long , find its speed . 
Options: a ) 52 , b ) 54 , c ) 56 , d ) 58 , e ) 60
Output (English): a