Subject: mathqa
Question: two stations p and q are 155 km apart on a straight track . one train starts from p at 7 a . m . and travels towards q at 20 kmph . another train starts from q at 8 a . m . and travels towards p at a speed of 25 kmph . at what time will they meet ?
Option: 
A: 12.30 am
B: 10 am
C: 11 am
D: 12 am
Answer: C