The traffic lights at three different road crossings change after every 48 sec., 72 sec. and 108 sec., respectively. If they all change simultaneously at hours $8:20:00$ , then at what time will they again change simultaneously ?

Question

cdquestions Admin · Accepted Answer

The correct option is (C): L.C.M of $(48,72,108)=432$ They will all change simultaneously after 432 seconds = 7 min 12 seconds $\therefore$ Time they will change again =  $ 8:20:00 + 00:07:12 = 8:27:12$  hours

Answer

$8:20:08 hrs$

Answer

$8:24:10 hrs$

Answer

$8:27:12hrs$

Answer

$8:30:15hrs$

The traffic lights at three different road crossings change after every 48 sec., 72 sec. and 108 sec., respectively. If they all change simultaneously at hours \(8:20:00\), then at what time will they again change simultaneously ?

The Correct Option is C

Solution and Explanation

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