You will be given a definition of a task first, then some input of the task.
The task is to generate the correct answer for a given math problem.

Problem: 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 ?
Output:
11 a . m