Two cities A and B are 135 km apart on a straight track. One car starts from A at 8 a.m. and travels towards B at 25 km/h. Another car starts from B at 9 a.m. and travels towards A at a speed of 30 km/h. At what time will they meet?
1
11 a.m.
2
10 a.m.
3
10.45 a.m.
4
11.30 a.m.