Q. The traffic lights at three different road crossings change after 24 s, 36 s and 54 s respectively. If they all change simultaneously at 10 : 15 : 00 am, then at what time will they again change simultaneously ?

• A. 10 : 16 : 54 am
• B. 10 : 22 : 12 am
• C. 10 : 17 : 02 am
• D. 10 : 18 : 36 am

Correct Answer: D