1.

 The traffic lights at three different road crossings change after every 48 sec., 72 sec and 108 sec.respectively .If they all change simultaneously at 8:20:00 hours,then at what time they again change

A. 7:25:14 hrs
B. 8:27:12 hrs
C. 9:22:08 hrs
D. 10:13:17 hrs
Answer» C. 9:22:08 hrs


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