
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
Given that Jeff and Ursula each run $30 \mathrm{~km}$, with Ursula running at a constant speed of $10 \mathrm{~km} / \mathrm{h}$, and Jeff's time to complete the $30 \mathrm{~km}$ is 1 hour less than Ursula's time to complete the $30 \mathrm{~km}$, calculate Jeff's speed in kilometers per hour.

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