The diagram shows the floor plan of a room. Adjacent walls are perpendicular to each other. Letters a and b represent the lengths of some of the walls. The area of the room is
A3ab − a2
B2a2+ 3ab
C3ab
D3ab − 2a2
The diagram shows the floor plan of a room. Adjacent walls are perpendicular to each other. Letters a and b represent the lengths of some of the walls. The area of the room is
A3ab − a2
B2a2+ 3ab
C3ab
D3ab − 2a2