Volume of cylinder
v = πr²
v = 22/7 x 21²
v = 1385.441 cm³
        
             
        
        
        
Answer:
10 hours
Step-by-step explanation:
320 = 30x + 20
300 = 30x
x = 10
 
        
                    
             
        
        
        
Answer:81.64
Step-by-step explanation:13x2=26 26x3.14=81.64
 
        
             
        
        
        
Answer:
The answer is One Solution 
The answer is One Solution