Answer:
64 poles
Step-by-step explanation:
Given the question :
Fence posts are erected 5m apart (with a post at each corner) to support fencing round a rectangular field. If the field measures 100m by 60m, how many posts are needed?
Dimension of rectangular field = 100m by 60m
Length = 100m ; breadth = 60m
Since it is erected around the corners of the field, we need to calculate the entire perimeter of the rectangular field.
Perimeter of a rectangle : 2( length + breadth)
Perimeter = 2(100 +60) = 2(160) = 320m
Since the posts are erected 5m apart, the number of post needed will be :
Perimeter / 5
= 320 / 5
= 64 poles
