A policeman spots a thief at a distance of $400 \text{ m}$. The thief starts running at $10 \text{ km/h}$ and the policeman chases him at $15 \text{ km/h}$. How much distance will the thief have run before he is caught?

Options:

  • A: $600 \text{ m}$
  • B: $800 \text{ m}$
  • C: $1000 \text{ m}$
  • D: $1200 \text{ m}$

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