Answer:
The distance around Fort Meade is 9/8 miles.
Explanation:
Givens.
- They walked 3/4 miles, which is 2/3 the distance around Fort Meade.
To know the distance around Fort Meade, which just need to the other 1/3 missing. We can use the rule of three in this case.
If 3/4 miles represents 2/3, how many miles would represents 1/3?

Which means the 1/3 missing represents 3/8 miles.
So, the total distance is

Therefore, the distance around Fort Meade is 9/8 miles.