QA train traveling at a speed of 75 mph enters a tunnel 7/2 miles long. The train is 1/4 mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?

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• A 2.5 min ✔ ✖
• B 3.2 min ✔ ✖
• C 3.5 min ✔ ✖
• D 3 min ✔ ✖

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