Task: Question Answering
Input (English): Problem: two trains of equal length , running with the speeds of 60 and 20 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 ) 12.5 , b ) 8.01 , c ) 7.5 , d ) 26 , e ) 22
Output (English): a