A pyramid has a square base. The perimeter of the base in kilometers is 0.640 kilometers.
Solution:
Given that pyramid has a square base
Each side of the base = 160 m
Need to determine perimeter of base in kilometer.
Perimeter of Square = 4 x length of side of square
Perimeter of square base having side as 160 meters = 4 x 160 = 640 meters
We need answer in kilometers
As 1000 meters = 1 kilometer

Hence perimeter of square base of pyramid having base side as 160 meters is 0.640 kilometers