Final answer:
The length between landmarks B and F is 10 times the distance AB.
Step-by-step explanation:
To find the length between landmarks B and F, we can use the information given in the question. The distance to the landmark is 10 times the distance AB. Let's say the distance AB is d. Then the distance from B to the landmark, BC, is 10d. Now, to find the length between landmarks B and F, we need to find the distance FC. Since FC and BC are parallel, and FC is the same length as BC, the length between landmarks B and F is also 10d.