Task: Question Answering
Input (English): Problem: a train passes a platform in 30 seconds . the same train passes a man standing on the platform in 20 seconds . if the speed of the train is 54 km / hr , the length of the platform is 
Options: a ) 150 meter , b ) 240 meter , c ) 200 meter , d ) 260 meter , e ) none of these
Output (English): a