The tail of a 1-mile long train exits a tunnel exactly 3 minutes after the front of the train entered the tunnel. If the train is moving \(80\) miles per hour, how long is the tunnel?
Let the length of the tunnel ==T
T + 1 ==80 x 3/60
T + 1 ==4
T ==4 - 1 ==3 miles - length of the tunnel.
