Question

the traffic light at three different road crosing change after every 48 sec,72 sec,108 sec respectivly at 8:20:00 hours when will they again change simultaneously​

Answer 1

Answer:

We know that in order to find the time when the three lights will change simultaneously again after 7 a.m., we need to find the LCM of 48, 72, and 108. Hence, converting 432 seconds into minutes and seconds, we get: 432 seconds = 7 minutes and 12 seconds.

Step-by-step explanation:

Thus, the three lights will change simultaneously again after 7 a.m. at 7:07:12 a.m.

l hope it's helpful for you