Question

Crystal wants to put a fence around her vegetable garden. Her garden is 5 ft wide and 4 ft long. She plans to put a post at each corner and at every foot. How many fence posts will Crystal need?

Answer 1

4 times 5 is 20 feet and if she's putting one at every foot then she needs 20 posts (drawing pictures on problems like these helps)

Answer 2

18 fence posts which is the perimeter of the garden