9. Is this possible? Can three people cover a distance of 60 km in 3 hours if they have a two-person motorcycle at their disposal? The motorcycle's speed is 50 km/h, and the pedestrian's speed is 5 km/h.
9. Yes. In the first hour, two of them ($\mathcal{A}$ and $B$) travel 50 km by motorcycle, while the third ($C$) walks 5 km. Then $B$, after getting off the motorcycle, walks the remaining distance to the destination in 2 hours. In the second hour, $C$ walks another 5 km, while $\mathcal{A}$ returns 40 km and waits for him there. In the remaining hour, $\mathcal{A}$ and $C$ travel to the destination on the motorcycle.