Answer: 5219 m or 5.219 km
Explanation:
Given: The distance from one end of park avenue to the other = 5.8 km
The distance walked by Ethan down park avenue =1,173 m
The distance he walked back to pick up the book he dropped = 592 m
The distance from the point where the book is dropped and the starting point= 1173m-592m=581 m
The distance he need to walk to before reaching the end of park avenue= 5.8km -581 m
Since 1 km = 1000 m,

Thus,

Hence, the distance he need to walk to before reaching the end of park avenue=5219 m or 5.219 km