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)	Choose one: A) 6810 B) 7920 C) 9030 D) 10,140 E) 11,250

Rationale: the distance the sound traveled to the man is 24 * 330 = 7920 meters the answer is b .
Answer: B