
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
The "Shenzhou 7" spaceship and its carrier rocket travel a distance of 2km in the first minute after ignition. In each subsequent minute, the distance traveled is 2km more than in the previous minute. The rocket and the spaceship separate when the total distance traveled is 240km. Find the time it takes for the rocket and the spaceship to separate.

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