Three girls start jogging from the same point around a circular track and they complete one round in 24 seconds, 36 seconds and 48 seconds respectively. After how much time will they meet at one point?
(a) 2 minutes, 20 seconds
(b) 2 minutes, 24 seconds
(c) 4 minutes 12 seconds
(d) 3 minutes 36 seconds
(e) None of these
