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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 simultaneously at 6: 10: 00 hrs then they will again change simultaneously at : ?->(Show Answer!)
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1. The traffic lights at three different road crossings change after every 48 seconds, 72 seconds and 108 seconds respectively. If they all change simultaneously at 6: 10: 00 hrs then they will again change simultaneously at :





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