If you multiply 10 by 4 that gets you the area, but you need to find the surface so multiply the product by 7 and that gets you the surface which is 280
        
             
        
        
        
Step-by-step explanation:
3.25÷2=1.625
19.5÷1.625=12
 
        
             
        
        
        
Answer: 12 9/10 and 10 7/8
Step-by-step explanation:
 5 8/10 plus 7 1/10 equals 12 9/10
8 5/8 plus 2 2/8 equals 10 7/8
 
        
             
        
        
        
3.825242926*10^16 is the answer.