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

Mr. Dubey • 52.30K Points
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Q. The traffic lights at three different road crossings change after 24 seconds, 36 seconds and 54 seconds respectively. If they all change simultaneously at 10 : 15 : 00 AM, then at what time will they again change simultaneously?

(A) 10 : 22 : 12 AM
(B) 10 : 17 : 02 AM
(C) 10 : 18 : 36 AM
(D) 10 : 16 : 54 AM

Correct Answer - Option(C)

Explanation by: Mr. Dubey

LCM of 24, 36 and 54 seconds

= 216 seconds

= 3 minutes 36 seconds

= 10 : 18 : 36 a.m.

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