
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A train that is 300 meters long takes 1 minute to go from entering a tunnel with its front end to exiting the tunnel with its rear end. The time the train is completely inside the tunnel is 30 seconds. What is the length of the tunnel in meters?

Present the answer in LaTex format: \boxed{Your answer}
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