
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
Xiao Bin rides a bicycle at a speed of 15 kilometers per hour, while Xiao Ming walks at a speed of 5 kilometers per hour. Both start from the same place at the same time and head to a school 30 kilometers away along the same route. After arriving at the school, Xiao Bin realizes he forgot his keys and heads back home along the same route, where he meets Xiao Ming on the way. The question is, how many kilometers did Xiao Ming walk by the time they met?

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