Traffic lights at three different road crossings change after every 24 sec, 36 sec, and 72 sec. If they change simultane...
Type: MCQ • Marks: 1
Traffic lights at three different road crossings change after every 24 sec, 36 sec, and 72 sec. If they change simultaneously at 8:00 AM, at what time will they change together next?
Options
A. 8:03:00 AM
B. 8:01:12 AM
C. 8:01:36 AM
D. 8:02:00 AM
Explanation
LCM(24, 36, 72) = 72 seconds = 1 min 12 sec. So they change together at 8:01:12 AM.
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Class 7thGanita Prakash 2
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