Question

Radha's family is leaving for a trip.All four members in the family set an alarm on their mobiles at interval of 5,10,15 and 20 minutes.If all the mobiles rang at 2 am then at what time will their phones ring together again?​

Answer 1

Answer:

3 am

Step-by-step explanation:

LCM of 5,10,15,20 is 60

So the alarm will ring after 60 min

2am + 60 min ( 1 hr) = 3 am

So the answer is 3am

Answer 2

Answer:

3AM

Step-by-step explanation:

LCM of 5, 10, 15, 20 is 60

So the alarm will ring after 60 min

2am + 60 min (1 hour) = 3Am

So the answer is =3AM

= 3AM