Task: Question Answering
Input (English): Problem: bruce and bhishma are running on a circular track of length 600 m . speed of bruce is 30 m / s and that of bhishma is 20 m / s . they start fro the same point at the same time in the same direction . when will they meet again for the first time ? 
Options: a ) 60 sec , b ) 70 sec , c ) 80 sec , d ) 90 sec , e ) 100 sec
Output (English): d