Question

two alaram clocks ring their alaram at regular intervals of 50second and 48 second . if they first beep together at 12 noon, at what time will they beep again for first time

Answer 1

Answer: 12:20

Step-by-step explanation:

Since the regular interval of alarms of the clocks is 50sec and 48sec.

So both alarms ring together after x sec., where x is LCM of 50 and 48. So both alarms ring together after 1200 sec. Now, since they beep together at 12 noon, So next time they beep together at 12:20 PM.