
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 truncated right pyramid has a square base with a side length of 15 cm and a smaller upper square base with a side length of 10 cm. The height from the center of the base to the center of the upper base is 20 cm. Calculate the total surface area of the truncated pyramid.

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