A and B are running around a circular track of length 120 meters with speeds 12 m/s and 6 m/s in the same direction. When will they meet for the first time?  Choose the most appropriate option:
A) A meets C  B) A meets B  C) A meets D  D) A meets A  E) A meets G
A meets B when A covers one round more than B.   A's relative speed = (12 - 6) m/s. So he takes 120 / 6 seconds to gain one extra round.   So after 20 seconds A meets B.   Answer:A meets B
<result>B</result>
A and B are running around a circular track of length 120 meters with speeds 12 m/s and 6 m/s in the same direction. When will they meet for the first time?