The traffic lights at three different road crossing change after every 48 sec; 72 sec; and 108 sec.
Question 1:
The traffic lights at three different road crossing change after every 48 sec; 72 sec; and 108 sec., respectively. If they all change simultaneously at 8:20:00 hrs, then they will again change simultaneously at
A.8:27:12 Hrs
FeedbackThe change of interval=(LCM of 48,72,108)sec.=432. So, for every 432 seconds i.e.7 min. 12 sec. the lights will change. So add 7 min.12 sec.to 8:20:00 Hrs.i.e.8:27:12 Hrs.
B.8:27:24 Hrs
C.8:27:36 Hrs
D.8:27:48 Hrs
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