5. (4 points) Cut a 15-meter long steel pipe into 5 segments, each cut takes 6 minutes, in total it will take $\qquad$ minutes.
【Answer】Solution: $(5-1) \times 6$
$$
\begin{array}{l}
=4 \times 6 \\
=24(\text { minutes })
\end{array}
$$

Answer: It takes a total of 24 minutes.
Therefore, the answer is: 24.