The distance between Town A and Town B is $620\text{km}$. Eric drives from Town A to Town B at a speed of $$75\text{km/h}$$ while Chien drives from Town B to Town A at a speed of $$80\text{km/h}$$. How many hours will it take for them to meet each other? 
选项为:A:$$4$$  B:$$6$$  C:$$24$$  D:$$124$$  请回答其中一个选项.