<h2>
Answer:</h2>
The radius of the cone is:
           
<h2>
Step-by-step explanation:</h2>
The total area of cone is given by:

where r is the radius of the cone and l is the slant height of the cone.
and the lateral area of cone is given by:

Hence, from equation (1) and (2) we have:
  
i.e.

i.e.

 
        
        
        

 = -7   Multiply both sides by 10
x = -70
C. x = -70
 
        
                    
             
        
        
        
Answer:
bruv this is second grade stuff
Step-by-step explanation:
9
 
        
                    
             
        
        
        
Answer:
a = 4
Step-by-step explanation:
 
        
                    
             
        
        
        
825 - 625i
Hope it’s right 
Best luck with your studying