
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 open-top rectangular container with length 40 cm, width 25 cm, and height 50 cm is filled with water to a depth of \( a \) cm, where \( 0 < a \leq 50 \). A cube with an edge length of 10 cm is then placed on the bottom of the container. What is the water depth after the cube is placed in the container?



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