
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
An oil tank, shaped like a right cylinder, is 20 feet tall and has circular bases each with a diameter of 5 feet. The tank currently rests horizontally, and the oil inside reaches a depth of 4 feet from the bottom. Determine how high the oil would reach if the tank were standing upright on its circular base. Express your answer in feet.

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