Answer:
1.5 km
Explanation:
1 kilometer = 1000 meters and 1 meter = 100 cm, so 1 km = 100,000cm
If the scale on the map is 1:25,000, 6cm on the map = 150,000 cm
Since 1 km = 100,000 cm, 1 km/100,000 cm = 1
150,000 cm x 1 km/100,000 cm = 1.5 x 1km = 1.5 km