Answer
220 $ft^{2}$
Work Step by Step
The area of the floor space can be divided into two rectangles.
Total area of the floor space = Area of the small rectangle + area of the large rectangle.
Area A of rectangle whose base has length b and height has length h is given by A =bh.
Area of small rectangle = bh = 10 * 10 = 100$ft^{2}$.
Area of large rectangle = bh =12 * 10 = 120 $ft^{2}$.
Therefore the total floor space area 100 + 120 = 220 $ft^{2}$.