Question

Vishvesh sets an alarm in two different clocks. The first alarm rings after every 30 minutes and the second alarm rings after every 90 minutes. If they rang together at 11 p.M., when is the earliest they will ring together again?

Answer 1

Alarm will ring together at 12:30 am

Step-by-step explanation:

We have given that Vishvesh set two alarms which rings one at every 30 minutes and one at after every 90 minutes

It is given that they rang together at 11 pm

LCM of 30 and 90 is 90

So they will rang together after 90 minutes

We know that 1 hour = 60 minutes

So 90 minutes = 1.5 hour

So they will ring together at 11 + 1.5 hour = 12:30 am

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