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 first time?
A. 12:10 PM
B. 12:12 PM
C. 12:11 PM
D. None of these
Answer: Option D
Solution (By Examveda Team)
They will ring together after, LCM of 48 and 50 secs. 48 = 2 × 2 × 2 × 2 × 3; 50 = 2 × 5 × 5 LCM = 2 × 2 × 2 × 2 × 3 × 5 × 5 = 1200 secs = 20 min. They will beep together at 12:20This Question Belongs to Arithmetic Ability >> Number System
but the correct option is 12:10 ??
the lcm FOR 48 AND 50 IS 1200 SO THE NEXT TIME WOULD BE 12:20PM
In tolling of alarm or ring, LCM is used to find out the least time.
why we are doing LCM of that two number... explain