The distance between two cities A and B is 330 km. A train starts from A at 8 a.m. and travels towards B at 60 km/hr. Another train starts from B at 9 a.m. and travels towards A at 75 km/hr. At what time do they meet? Choose the correct answer:
A) 10 a.m B) 07 a.m C) 11 a.m D) 03 a.m E) 06 a.m
Suppose they meet x hrs after 8 a.m. Then,   (Distance moved by first in x hrs) + [Distance moved by second in (x - 1) hrs] = 330   60x + 75(x - 1) = 330 =&gt; x = 3   So, they meet at (8 + 3) i.e., 11 a.m.   Answer: 11 a.m
<result>C</result>
The distance between two cities A and B is 330 km. A train starts from A at 8 a.m. and travels towards B at 60 km/hr. Another train starts from B at 9 a.m. and travels towards A at 75 km/hr. At what time do they meet?