Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 kmph. At what time will they meet?  Choose the correct choice from the following answers:
A) 9 a.m.  B) 10 a.m.  C) 10.30 a.m.  D) 11 a.m.  E) 11.30 a.m
Suppose they meet x hours after 7 a.m.   Distance covered by A in x hours = 20x km.   Distance covered by B in (x - 1) hours = 25(x - 1) km.   Therefore 20x + 25(x - 1) = 110   =&gt; 45x = 135   =&gt; x = 3.   So, they meet at 10 a.m.   Answer: Option 10 a.m.
<result>B</result>
Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 kmph. At what time will they meet?