Q. The traffic lights at three different road crossings change after 24 seconds, 36 seconds and 54 seconds respectively. If they all change simultaneously at 10 : 15 : 00 AM, then at what time will they again change simultaneously?
✅ Correct Answer: (C)
10 : 18 : 36 AM
Explanation: LCM of 24, 36 and 54 seconds
= 216 seconds
= 3 minutes 36 seconds
= 10 : 18 : 36 a.m.
Explanation by: Mr. Dubey
LCM of 24, 36 and 54 seconds
= 216 seconds
= 3 minutes 36 seconds
= 10 : 18 : 36 a.m.
= 216 seconds
= 3 minutes 36 seconds
= 10 : 18 : 36 a.m.