A farmer has decided to build a wire fence along one straight side of the property. For this he planned to place to place several fence posts at 6m intervals =, with posts fixed at both ends of the side. After he bought the posts and wire, he found that the number of posts he bought was 5 less than required. However he discoverd that the number of posts he had bought would be just sufficient if he saced them 8 m apart. What is the length of the isde of his property and how many posts did he buy