Mathematics · LCM and HCF
The traffic signals at three different road crossings change after every 45 seconds, 75 seconds and 90 seconds respectively. If they all change simultaneously at 9:30:00 a.m., then at what time will they next change again simultaneously?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 19:38:00 a.m.
- 29:37:30 a.m.✓
- 39:39:10 a.m.
- 49:39:20 a.m.
Correct answer
9:37:30 a.m.
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