Question

3 different alarm clocks rings at 12,15,18 second intervals. If it rings together at 8.35 am when will be the next time?

Answer 1

Step-by-step explanation:

3 different clocks rings at an interval of 12,15,18 second.

they ring together at 08:35 am.

they will ring together at :

LCM of 12,15,18 = 180 second

they will ring together after 180 second.

Since, 60 second = 1 minute

1 second = 1/60 minute

180 second = 1/60 * 180 minutes

180 second = 3 minutes

they will ring together after 3 minutes.

08:35 + 03 minutes = 08:38 am.

All bell will ring together on 08 : 38 am