Question

Marty has a fence in the shape of a rectangle. It's area is 635.4 square feet. the width of the yard is 18 feet. what is the length of the yard?

Answer 1

Divide the area by the width (or the number that the problem gave you). So 635.4/18. This will give you the length because of the formula
length x width = area (formula for the area of a rectangle). So in this case the answer should be 35.3 

If you want to check your work just multiply the width by the length. 35.3x18= 635.4