A man has a garden 10 meters square to fence. How many fence posts are needed if each post is 1 meter from the adjacent posts?
2 answers
39
If the garden is square and has sides of n metres, then each side will require 2+(n-1) posts with the 2 posts at the corners. As the corner posts are common with adjacent sides then the total number of posts is
4 sides of n-1 plus 4 corner posts.
4(n-1) + 4.
if n=10 then the number of posts is
4(10-1)+4=40
4 sides of n-1 plus 4 corner posts.
4(n-1) + 4.
if n=10 then the number of posts is
4(10-1)+4=40
1 answer