Solve the following problems.
We observed the traffic lights at three different squares on the same big road. They turn green every 60 seconds, 120 seconds and 24 seconds. When the signals are switched on at 8 o’clock in the morning, all lights were green. How long after that will all three signals turn green simultaneously again?

Explanation

To solve the problem of when all three traffic lights will turn green simultaneously again, we need to find the Least Common Multiple (LCM) of the time intervals at which each light turns green.

### Step-by-Step Solution:

1. **Identify the time intervals**:
- The first traffic light turns green every **60 seconds**.
- The second traffic light turns green every **120 seconds**.
- The third traffic light turns green every **24 seconds**.
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