Answer:
600 meters
Explanation:
You have a map distance of 1.5 cm on a map with a scale of 1:40,000. You want to know the actual distance.
Scale
The map scale of 1:40,000 tells you the actual distance is 40,000 times the map distance:
(1.5 cm) × 40,000 = 60,000 cm = 600 m
The length of the bridge is 600 meters.