The traffic lights at three different road crossings change after 24 seconds, 36 seconds and 54 seconds respectively. If they all change simultaneously at 10:50:00 am, then at what time will they again change simultaneously?

10:16:54 am

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10:18:36 am

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10:17:02 am

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10:22:12 am

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None of these

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Solution

The correct option is B 10:18:36 am
L.C.M. of 24 seconds, 36 seconds and 54 seconds = 216 seconds = 3 min 36 seconds
Required time = 10:18:36 am.

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The traffic lights at three different road crossings change after 24 seconds, 36 seconds and 54 seconds respectively. If they all change simultaneously at 10:50:00 am, then at what time will they again change simultaneously?

The correct option is B 10:18:36 amL.C.M. of 24 seconds, 36 seconds and 54 seconds = 216 seconds = 3 min 36 seconds Required time = 10:18:36 am.

The correct option is B 10:18:36 am
L.C.M. of 24 seconds, 36 seconds and 54 seconds = 216 seconds = 3 min 36 seconds
Required time = 10:18:36 am.