Detailed Instructions: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
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 ?
Options: a. 10 a. m, b. 10.30 a. m, c. 11 a. m, d. 11.30 a. m, e. none of these
Solution:
c