Answer:
28m
Step-by-step explanation:
2x+x=42
3x=42
x=14
However, since the length of the rectangle is twice the width, we'll need to multiply it by 2. 
So: 14 times 2=28
 
        
             
        
        
        
Answer:
A: 42
Step-by-step explanation: 10.5x4=42
 
        
                    
             
        
        
        
Pi feet squared (I hope I helped!)