25,200 hours 
112x12=1,344
212x112=23,744
1,344+23,744+112=25,200
        
                    
             
        
        
        
Answer:
T^2=4π^2*L/G
L=(T^2*G)/4π^2
Step-by-step explanation:
hope this helps 
 
        
                    
             
        
        
        
Answer:
b and c
Step-by-step explanation:
The Triangle Inequality Theorem lets us know that the sum of the two shortest sides of the triangle must be greater than the third side of the triangle.
 In both A and D, the sum of the shortest two sides are equal to, not greater than the third side, so they will not form a triangle.
In B, 12+20 is 32, which is greater than 25. And in C, 18+24 is 42, which is greater than 30, so they both will form a triangle.
 
        
             
        
        
        
Not sure if this is what your looking for but 25x10=250