The distance between two cities A and B is 330 Km. A train starts from A at 8 a.m. and travel 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 most appropriate option.
A) 10 am  B) 11 am  C) 12 pm  D) 1 pm  E) 2 pm
Explanation:   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   So, 60x+75(x-1) = 330   x=3.   So,they meet at (8+3). i.e 11a.m.   Option 11 am
<result>B</result>
The distance between two cities A and B is 330 Km. A train starts from A at 8 a.m. and travel 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?