Question

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

Answer 1

Answer:

The traffic lights at three different roads crossing change after every 48 seconds, 72 seconds, and 108 seconds. How often will they change simultaneously? It depends. If at some point they were changing simultaneously, they will continue to do so every 432 seconds.

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Answer 2

If at some point they were changing simultaneously, they will continue to do so every 432 seconds.