(2) According to the legend, it can be seen that the experimental primary school is 75 southwest of the county government. Because the scale is each unit line segment length 100 meters, the experimental primary school is 300 meters southwest of the county government, and the distance on the map is 300÷ 100=3 (unit) line segment length;
(3) From the map, Heping Street is in the east of the county government, perpendicular to Jianshe Road, with a distance of 200 meters. Because the scale is that the length of each unit line segment is 100 meters, the distance on the map is (200- 100) unit line segments.
Draw a picture as follows: