Tricky Train Timing

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A train travels from Station A to Station B, covering a distance of 180 miles. If the train travels at a speed of 45 miles per hour, how long will it take to reach Station B? After reaching Station B, it immediately returns to Station A, but this time at a reduced speed of 30 miles per hour. What is the total time taken for the entire journey from Station A to Station B and back?

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