Mathematics · LCM and HCF
Three different traffic signals change lights every 72, 108 and 48 seconds respectively. If the lights change simultaneously at 9:30:00 am, then at what time will they change simultaneously next?
- 19:37:20 am
- 29:44:24 am
- 39:37:12 am✓
- 49:36:12 am
Correct answer
9:37:12 am
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