Q. The traffic lights at four different road crossings change after every 15 sec, 18 sec, 27 sec and 30 sec respectively. If they all change simultaneously at 6:10:00 hours, then at what time will they again change simultaneously?
A) 6:40:00 hours
B) 6:14:30 hours
C) 10:40:00 hours
D) 6:14:00 hours
✔ Correct Answer: 6:14:30 hours
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