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Question

an electric device makes a beep every 60 seconds. another device makes a beep every 62 seconds. they beep together at 10:30 am. find the time they will make a beep together at the earliest 


Solution

L.C.M. of 60 and 62 seconds is 1860 seconds
1860/60 = 31 minutes

They will beep together at 10:30 a.m. + 31 minutes = 11:01 a.m.

Mathematics

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