7. Three soldiers need to reach the headquarters, located 60 km from the front line, within 3 hours. Can they do it, given that a pedestrian walks at a speed of 5 km/h and they have a motorcycle that can carry no more than two people at a speed of no more than 50 km/h?
7. In one hour, two soldiers will travel 50 km on a motorcycle, while one will walk 5 km. Then, one of the two who were on the motorcycle can walk the remaining 10 km in 2 hours, meaning he will reach the headquarters in 3 hours. The second of the two who were on the motorcycle can return to pick up the pedestrian, traveling at a speed of 40 km/h. The pedestrian will walk 10 km in this time (2 hours). The remaining soldiers can travel the last 50 km on the motorcycle in 1 hour. Thus, all three soldiers will reach the headquarters in 3 hours.

Answer: the three soldiers will reach the headquarters in three hours.

## SEVENTH