Question

The traffic lights at three different road crossings change after every 60 seconds, 72 seconds and 108 seconds respectively. If they change simultaneously at 8 am. At what time, will they change simultaneously again

please help me​

Answer 1

Answer:

LCM of 60, 72 and 108 = 1080

After 1080 second they change simultaneously again.

1080 second into minutes :-

1 minute = 60 second

1080/60 = 18 minutes

They again change simultaneously on 8 : 18 am.

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