
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 motorboat moves on calm water with a speed of \( v_{0} = 20 \, \text{km/h} \). Determine the speed of the motorboat 2 minutes after turning off the engine, given that its speed decreased to \( v_{1} = 8 \, \text{km/h} \) in 40 seconds. The water resistance is proportional to the boat's speed.

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