Arrange the legs of the trip from highest velocity to lowest by calculating the average velocity for each leg.

[tex]\[

\begin{array}{|c|c|c|}

\hline

\text{Leg} & \text{Distance (km)} & \text{Time (min)} \\

\hline

A & 18 & 9 \\

B & 25 & 15 \\

C & 24 & 8 \\

D & 48 & 12 \\

E & 15 & 7 \\

\hline

\end{array}

\][/tex]

Calculate the velocity for each leg:
- Leg A: [tex]\( \frac{18}{9} \, \text{km/min} \)[/tex]
- Leg B: [tex]\( \frac{25}{15} \, \text{km/min} \)[/tex]
- Leg C: [tex]\( \frac{24}{8} \, \text{km/min} \)[/tex]
- Leg D: [tex]\( \frac{48}{12} \, \text{km/min} \)[/tex]
- Leg E: [tex]\( \frac{15}{7} \, \text{km/min} \)[/tex]

Then, arrange them from highest to lowest velocity.