Mathematics · LCM and HCF
Traffic lights at three different road crossings change after every 36 seconds, 48 seconds and 72 seconds respectively. If they all change simultaneously at 8:00:00 AM, after how much time interval will they change together again?
- 12 minutes 24 seconds✓
- 22 minutes 20 seconds
- 32 minutes 40 seconds
- 42 minutes 12 seconds
Correct answer
2 minutes 24 seconds
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