Task: Question Answering
Input (English): Problem: two trains of equal length , running with the speeds of 60 and 40 kmph , take 75 seconds to cross each other while they are running in the same direction . what time will they take to cross each other if they are running in opposite directions ? 
Options: a ) 15 sec , b ) 16 sec , c ) 14 sec , d ) 67 sec , e ) 13 sec
Output (English): a