
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
Usain runs twice as fast as his mum. His mum runs five times as fast as his pet tortoise, Turbo. They all set off together for a run down the same straight path. When Usain has run $100 \mathrm{~m}$, how far apart are his mum and Turbo the tortoise?
A $5 \mathrm{~m}$
B $10 \mathrm{~m}$
C $40 \mathrm{~m}$
D $50 \mathrm{~m}$
E $55 \mathrm{~m}$

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