Question

the traffic lights at three different road crossing changes after every 40 seconds,60 seconds 72 seconds.If they change simultaneously together at 8 am at junctions.at what time will they change simultaneously again?

options
9:14 am
7:10 am
8:10 am
8:6 am

please explain step by step​

Answer 1

Answer:

7:10

Step-by-step explanation:

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