Final answer:
The length of the road in real life is 8 km.
Step-by-step explanation:
To find the length of the road in real life, you need to use the scale provided in the question. The scale of the map is 1: 200,000, which means that 1 cm on the map represents 200,000 cm or 2,000 m in real life.
Since the length of the road on the map is 4 cm, you can multiply this by the scale factor to find the length in real life:
4 cm x 2,000 m/cm = 8,000 m
Converting this to kilometers, the length of the road in real life is 8 km.