Answer:
the second one
Step-by-step explanation:
Answer: 9
Step-by-step explanation:

Answer:
The length of the river on a map is 
Step-by-step explanation:
we know that
The scale of the map is 
That means
1 cm on a map is 5,000,000 cm on the actual
or
1 cm on a map is 50 km cm on the actual
so
using proportion
