
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
Two buses simultaneously departed from the factory and headed to a recreational area by the lake. The distance between the factory and the lake is 48 km. The first bus arrived at the lake 10 minutes earlier than the second bus, and the average speed of the second bus is 4 km/h less than the average speed of the first bus. Calculate the speeds of the buses.

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