13. Xiao Li drives from location A to location B. After 2 hours, the car breaks down at location C. It takes 40 minutes to repair the car, and after the repair, the speed is only 75% of the normal speed, resulting in arriving at B 2 hours later than the planned time. If the car breaks down 72 kilometers past location C at location D, with the repair time and the speed after repair still being 40 minutes and 75% of the normal speed, respectively, then he arrives only 1.5 hours later than the planned time. Therefore, the distance between A and B is $\qquad$ kilometers.
【Solution】Solution: C and D walk at two different speeds, taking a time ratio of $3: 4$. The original time for this segment was $0.5 \times 3=1.5$ hours, and the original speed of the car was $72 \div 1.5=48$ km/h. The current speed is $48 \times \frac{3}{4}=36$ km/h.
C to B is walked at different speeds, with a time ratio of: $3: 4$,
The original planned time from C to B:
$$
\begin{aligned}
& \left(2-\frac{2}{3}\right) \times 3 \\
= & \frac{4}{3} \times 3 \\
= & 4 \text { (hours) } \\
& (4+2) \times 48 \\
= & 6 \times 48 \\
= & 288 \text { (km) }
\end{aligned}
$$

Answer: The total distance between A and B is 288 km.
Therefore, the answer is: 288.