9. At a road crossing, there are 3 traffic lights. The first light changes
to green every 30 seconds. The second traffic light changes to green
every 60 seconds. The third traffic light changes to green every 90
seconds. If they all turn to green at 8:12am, at what time will they
turn to green again? (2M)
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Answer:
the green light will turn on again ob8:15am
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