A police spots a burglar from $$480$$ m apart. The burglar immdiately runs away at a speed of $$8$$ m/s and the police starts chasing him at $$12$$ m/s at the same time. At this rate, how long will it take the police to catch the burglar? 
Overseas Competition->Knowledge Point->Distance Word Problems->Distance Word Problems on Straight Road
The distance between them is $$480$$ m, and the difference between their speeds is $$12-8=4$$ m/s. It takes $$480\div4=120$$ seconds to catch the burglar, which is $$2$$ minutes 