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The traffic lights at three different road crossings change after every 48 seconds,72 seconds and 108 seconds respectively .If they all change together at 8:20:00 hours,then at what time they would again change together .

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The traffic lights at three different road crossings change after every 48 seconds,72 seconds and 108 seconds respectively .If they all change together at 8:20:00 hours,then at what time they would again change together .






 
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