Question

the traffic lights at three different road crossings change after every 4 sec 5 sec and 10 sec.if they change simultaneously at 5:20:00 hours,then find the time at which they will change simultaneously​

Answer 1

Answer:

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Step-by-step explanation:

Hence, converting 432 seconds into minutes and seconds, we get: 432 seconds = 7 minutes and 12 seconds. Thus, the three lights will change simultaneously again after 7 a.m. at 7:07:12 a.m.