
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 cone-shaped mountain has its base on the ocean floor and has a height of 12000 feet. The top $\frac{1}{5}$ of the volume of the mountain is above water. Find the depth of the ocean at the base of the mountain in feet.

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