the traffic lights at three different roads crossings change after every 48sec., 72 sec. and 108 sec. respectively. if they all change simultaneously at 8hours then at what time will they again change simultaneously
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The L.C.M comes out to be 432 seconds i.e. 7.2 minutes
So after 7.2 minutes they will change again simultaneously
So after 7.2 minutes they will change again simultaneously
hunny21:
how will 7.2will come
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