Question

The traffic light at three different road crossings change after
every 48 seconds, 72 seconds and 108 seconds respectively. If
they change simultaneously at 8 a.m., at what time will they
change together again?

Answer 1

Answer:

ans is 8:07 am because take lcm of all then take

Answer 2

Answer:

• Explanation: 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.