The area of the floor based on the diagram is 560 ft². Option C.
What is the area of the floor?
The area of the floor consists of two areas of rectangle.
Rectangle A:
Length = 30 ft
Width = 12 ft
Area of rectangle A = Length × width
= 30 ft × 12 ft
= 360 square feet
Rectangle B:
Length = 20 ft
Width = 10 ft
Area of rectangle B = Length × width
= 20 ft × 10 ft
= 200 square feet
Therefore,
The area of the floor = Area of rectangle A + Area of rectangle B
= 360 square feet + 200 square feet
= 560 square feet