CROSS The traffic lights at three different road change after every 50 sec., 75 sec. and 100 respectively. If they start changing simultaneo at 8 a.m., after how much time will they cha again simultaneously?
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We know that in order to find the time when the three lights will change simultaneously again after 7 a.m., we need to find the LCM of 48, 72, and 108. Hence, converting 432 seconds into minutes and seconds, we get: 432 seconds = 7 minutes and 12 seconds.
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