An electronic device makes a beep after every 60 sec. Another device makes a beep after every 62 sec. They beeped together at 10 am. The next time, when they would beep together at the earliest is = ?
A. 10.30 am
B. 10.31 am
C. 10.59 am
D. 11 am
Answer: Option B
Solution(By Examveda Team)
Interval of change= (LCM of 60 and 62) sec
= 1860 sec
= 31 min
So, the devices would beep together 31 min after 10 am
i,e; at 10.31 am
This Question Belongs to Arithmetic Ability >> Problems On H.C.F And L.C.M
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Why we use lcm sir.....