
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
Draw two concentric semicircles with radii of 2 cm and 4 cm on a sheet of paper. Cut out the paper section between these semicircles and their common diameter, and align the straight edges of the resulting paper "semiring" together. What is the volume of the resulting truncated cone?

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