Incorrect
Explanation
Two minutes. It takes the front of the train one minute and the rest of the train will take two minutes to clear the tunnel.
Solve this puzzle
How many pounds did Renée Zellweger gain for the part of Bridget Jones in the 2001 film "Bridget Jones's Diary"?
10 to 20 pounds 30 to 40 pounds 20 to 30 pounds 5 to 10 pounds