Find the distance covered by the chain snatcher when he is caught by the policeman?

A policeman sees a chain snatcher at a distance of 50 m. He starts chasing the chain snatcher who is running with a speed of 4 m/s, while the policeman chasing him with a speed of 6 m/s. Find the distance covered by the chain snatcher when he is caught by the policeman?

1. 50 m
2. 100 m
3. 75 m
4. None of these