Points A and B are 200 km apart. A person starts from A at 10 a.m. at a speed of 10 km/h and goes towards B. Another person starts from B at 11 a.m.at a speed of 20 km/h and goes towards A. At what time will they meet?
1
5:10 p.m.
2
4:40 p.m.
3
5:40 p.m.
4
5:20 p.m.