Question

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

Answer 1

Answer:

7:07:12

Step-by-step explanation:

you meed to just Find LCM of all three and add the the answer to 7:00 a.m.

please like my answer

Answer 2

Answer:

Step-by-step explanation:   I 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.