Section: Mathematical Reasoning

28) John was building a new fence, and he wants it to stand 8 1/2 feet above ground level. To make sure it is secure he must place it 2 3/4 feet into the ground. How long of a post should John buy?

1. 10 1/2 feet
2. 10 3/4 feet
3. 11 feet
4. 11 1/4 feet
5. 11 1/2 feet