Subject: mathqa
Question: the distance between 2 cities a and b is 1000 km . a train starts from a at 12 p . m . and travels towards b at 100 km / hr . another starts from b at 1 p . m . and travels towards a at 150 km / hr . at what time do they meet ?
Option: 
A: 12 p . m .
B: 11 am .
C: 5 pm .
D: 2 p . m .
Answer: C