Task: Question Answering
Input (English): Problem: two trains of equal length , running with the speeds of 60 and 100 kmph , take 50 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 ) 10 , b ) 6.25 , c ) 7.35 , d ) 2.62 , e ) 2.28
Output (English): b