The traffic lights at 3 different roads change after every 14 sec, 72 sec, 108 sec respectively. If they all change simultaneously at 9:15 AM then at what time will they again change simultaneously.	Answers.
A) 9:22:12 B) 9:42:15 C) 10:15:24 D) 9:40:12 E) 10:01:20
LCM of 14,72,108 = 1512 = 25mnts 12sec   The lines will change every 25m 12sec   The light will change again after 9:15 AM is = 9:15+0:25:12 = 9:40:12   Answer is 9:40:12
<result>D</result>
The traffic lights at 3 different roads change after every 14 sec, 72 sec, 108 sec respectively. If they all change simultaneously at 9:15 AM then at what time will they again change simultaneously.