Question

the traffic lights at three different road crossing change after 24second , 36seconds, 54seconds respectively. If they all change simultaneously at 10:15:00 am then at what time they again change the simultaneously​

Answer 1

Answer:

LCM of left(24, 36, 54)

⇒ 12 × 2 × 3 × 3 = 216 sec

⇒ They will change simultaneously after every 216 seconds

⇒ 21660

⇒ 33660

⇒ 3 minute 36 seconds

⇒ They change 1st at 10:15:00 AM

So, again they change at = 10:18:36 AM

Answer 2

Answer:

10:18:36 is the answer..