A farmer wants to put up fencing around his rectangular field to keep his cows from grazing the growing plants. 1. If the length of the field is 300 ft and the width is half of the length, find the perimeter of the field. Field Perimeter = ft 2. If each fence consists of 5 individual strands of wire attached to a post positioned every 10 feet. (A) How many fence posts are needed? posts (B) How many feet of wire is needed? ft of wire