A rectangular building whose depth is twice its frontage is divided into two parts, a front portion and a rear portion, by a partition that is 30 feet from and parallel to the front wall.
Identify the front (width) by the letter "x" and write the following:
Depth (length) of the building
Length of the rear portion
Write an expression for the area of the rear portion
Hint: Make a sketch on a scratch paper to describe the dimensions.
The solution provides an application of geometry to find the dimensions of a building.