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- An electronic device makes a beep after every 60 sec.
Question 1:
An electronic device makes a beep after every 60 sec. Another device makes a beep after every 62 sec. They beeped together at 10 a.m.The time when they will next make a beep together at the earliest, is
A. 10:28 am
B. 10:30 am
C. 10:31 am
Feedback L.C.M. of 60 and 62 seconds is 1860 seconds 1860/60 = 31 minutes
They will beep together at 10:31 a.m.
Sometimes questions on red lights blinking comes in exam, which can be solved in the same way
They will beep together at 10:31 a.m.
Sometimes questions on red lights blinking comes in exam, which can be solved in the same way
D. None of above
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