The answer is 16.5. because of the 2 after the 5, you keep it the same
        
                    
             
        
        
        
Answer:
length = 32m, width= 16m
Step-by-step explanation:
l=2w
2(2w+w)=96
2(3w)=96
6w=96,w= 96/6 = 16m
l=2w=2x16=32m
 
        
                    
             
        
        
        
At first we should calculate Monthly income by multiplying 2 then After multiplying by 12 to calculate Annual income
 
        
             
        
        
        
You have 4 walls, 2 with length 12 feet, 2 with length 15 feet and each of them has a height of 12 feet
so you sum all the lengths and then multiply it by the height to get the total area
total length=2*(12+15)
=2*(27)
=54
total area=total length*ceiling height
=54*12
=648 feet^2 to cover all walls with wallpaper