Question

There are 3 traffic lights on a road. They turn red after every 120 sec, 150 sec and 180 sec. If they turn red at 1:00 am in the morning, at what time will they turn red together next?

1:30 pm

1:35 am

1:30 am

1:25 am​

Answer 1

Answer:

1:30

Step-by-step explanation:

First take out the LCM of 120, 150 and 180 which is 1800 secs

Then convert it to mins by dividing by 60 which is 30.

Lastly add 30 mins to 1 which is 1:30 pm