A train travels from City A to City B at a constant speed of 60 miles per hour. It then travels from City B to City C at a constant speed of 50 miles per hour. The total distance from City A to City C is 330 miles, and the time taken to travel from City A to City B is 2 hours. How long does it take for the train to travel from City B to City C? Let's think step by step and output the final answer within \boxed{}.
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