Answer:

Step-by-step explanation:
i hope this helps
 
        
             
        
        
        
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Answer:
The surface area of cone = 54π cm² 
Step-by-step explanation:
Given ; 
 Radius = 3 cm 
 slant height = 15cm 
The surface area of cone = πr ( r + l ) 
=> π × 3 ( 3 + 15) 
=> π × 3 ( 18) 
=> 54 π cm²
 
        
                    
             
        
        
        
Answer:
130
Step-by-step explanation:
100+30=130