Two alarm clocks ring their alarms at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12 noon, at what time will they beep again for the first time?
12:10 P.M.
12:12 P.M.
12:11 P.M.
None of these
Explanation:
The LCM of 50 and 48 being 1200, the two clocks will ring again after 1200 seconds.
The LCM of 50 and 48 being 1200, the two clocks will ring again after 1200 seconds.