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?
(a) 3
(b) 6
(c) 9
(d) 12
(e) 15
OA:D
What's the fastest way to solve this? Thanks!
(a) 3
(b) 6
(c) 9
(d) 12
(e) 15
OA:D
What's the fastest way to solve this? Thanks!
