
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 cars, Car A and Car B, start from point \( A \) and travel to point \( B \) at the same time. When Car A reaches point \( B \), Car B is still 15 kilometers away from point \( B \). If, starting from the midpoint between \( A \) and \( B \), both cars double their speeds, how far will Car B be from point \( B \) when Car A reaches point \( B \)?

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