6. (15 points) A pedestrian is moving in a straight line towards a crosswalk at a constant speed of 3.6 km/h. At the initial moment, the distance from the pedestrian to the crosswalk is 40 m. The length of the crosswalk is 6 m. At what distance from the crosswalk will the pedestrian be after two minutes?
Answer: 74 m.

Solution. The pedestrian's speed is 3.6 km/h = 1 m/s. In two minutes, he walked $s=v t=1 \cdot 120 s=120$ m. From the crossing, he is at a distance of $l=s-40-$ $6=74 \mathrm{~m}$.