Task: Question Answering
Input (English): Problem: a man started driving at a constant speed , from the site of a blast , the moment he heard the blast . he heard a second blast after a time of 30 mins and 24 seconds . if the second blast occurred exactly 30 mins after the first , how many meters was he from the site when he heard the second blast ? ( speed of sound = 330 m / s ) 
Options: a ) 6810 , b ) 7920 , c ) 9030 , d ) 10,140 , e ) 11,250
Output (English): b