The "Racing magic" takes 120 seconds to circle the racing track once. The "Charging bull" makes 40 rounds of the track in an hour. If they left the starting point together, how many minutes will it take for them to meet at the starting point for the second time?
Choose the correct choice from the following answers:
A) 3  B) 6  C) 9  D) 12  E) 15
Time taken by Racing magic to make one circle = 120 seconds = 2 mins   Time taken by "Charging bull" to make one circle = 60 mins / 40 = 1.5 mins = 90 seconds   LCM of 90 and 120 seconds = 360 seconds = 6 mins   Time taken for them to meet at the starting point for the second time = 6 mins *2 = 12 mins   Answer 12
<result>D</result>
The "Racing magic" takes 120 seconds to circle the racing track once. The "Charging bull" makes 40 rounds of the track in an hour. If they left the starting point together, how many minutes will it take for them to meet at the starting point for the second time?