Question

The traffic lights at three different road crossings change after every 48 seconds, 72seconds and 108 seconds. If they start changing simultaneously at 8 a.m., after how much time will they change again simultaneous ?​

Answer 1

Answer:

432

Step-by-step explanation:

so their crossing change after 49,72,108 seconds

at 8 pm their least time in which all the light will be same

will be its LCM

so therir LCM will be 432 seconds

Answer 2

Answer:

Your answer is 8:3.48 am