1.

The traffic lights at three different road crossings change afterevery 48 seconds, 72 seconds and 108 seconds respectively. If theychange simultaneously at 7 am, at what time will they changesimultaneously again?​

Answer»

Step-by-step EXPLANATION:

FIND the PRIME FACTOR

48=24×33

72 =23×32

its answer is 8:07:12am



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