10. (6 points) A train is 90 meters long, and it passes through a tunnel at a speed of 160 meters per minute, taking 3 minutes. The length of the tunnel is ______ meters. $\qquad$
【Solution】Solution: $160 \times 3-90$,
$$
\begin{array}{l}
=480-90, \\
=390 \text { (meters), }
\end{array}
$$

Answer: The cave is 390 meters long.
Therefore, the answer is: 390.