Question

rectangular kitchen has an area of 81 square feet. the kitchen is 9 times as many square feet as the pantry.. If the rectangular pantry is 3 feet wide, what is the lenght of the pantry?

Answer 1

To find the area of the pantry you divide 81 by 9 because the kitchen is 9 times the area of the pantry. 
81/9 = 9
Therefore the pantry is 9 square feet. 
The area of a rectangle is LxW. you have an area of 9 and a width of 3 so
9 = Lx3
9/3 = L
3=length