The traffic lights at four different road crossings change after every – McqOptions

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1.	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?_x005F_x000D_
A.	6:14:30 hours
B.	6:40:00 hours
C.	6:14:00 hours
D.	10:40:00 hours
Answer» B. 6:40:00 hours

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