Answer:
The angle between the two blades is 120 degree.
Step-by-step explanation:
number of blades = 3 
The blades are equally spaced. 
The total angle around a circle is 360 degree. 
So, the angle between the two blades is given by 

 
        
             
        
        
        
Answer:
3.14
That is the value of pi to the second decimal point
 
        
             
        
        
        
Answer:
71.25
Step-by-step explanation:
That's the answer
 
        
             
        
        
        
Answer:
The length of the rectangle=16/45 feet
Step-by-step explanation:
The area of a rectangle is given by;
A=L×W
where;
A=area of the rectangle
L=length of the rectangle
W=width of the rectangle
In our case;
A=(8/10) square feet
L=unknown
W=2 1/4 feet=9/4 feet
replacing;
8/10=l×9/4
l=8/10×4/9
l=16/45 feet 
The length of the rectangle=16/45 feet