8. (5 points) The speeds of two cars $A$ and $B$ are 102 km/h and 80 km/h, respectively. They start from location A to location B at the same time. After 6 hours, car $A$ meets a truck coming from the opposite direction. One hour later, car $B$ also meets this truck. Find the speed of the truck in km/h. $\qquad$ km/h.
【Solution】Solution: $102-80 \times 6 \div 1-80$
$$
\begin{array}{l}
=132-80 \\
=52 \text { (km/h) }
\end{array}
$$

Answer: The speed of this truck is 52 kilometers per hour.
Therefore, the answer is: 52.