Task: Question Answering
Input (English): Problem: two persons start running simultaneously around a circular track of length 250 m from the same point at speeds of 20 kmph and 40 kmph . when will they meet for the first time any where on the track if they are moving in the opposite direction ? 
Options: a ) 144 , b ) 15 , c ) 18 , d ) 32 , e ) 38
Output (English): b