(not sure )
my method 
let projection of b onto line dq be M 
BM is 2r 
then let the remaining angle ( right) be K 
in triangle BMK ,
MK = 29-5-r 
By Pyth. theorem ,
23^2 = (2r)^2+(29-5-r)^2
529=4r^2+576-48r+r^2
5r^2-48r+47=0 
r = 8.493237063 or 1.106762937(rejected)
        
             
        
        
        
Remark
All Cavaliere's principle says is that a slanted cylinder (for example) has the same volume as a cylinder with perpendicular parallel lines that the cylinder is sitting on.
I little known or maybe not a well emphasized fact is that the base is the same all the way up the cylinder. The coin picture below shows that. The basic formula for a Cavaliere cylinder is the same as for an ordinary cylinder.
See picture below
Formula
V = B * H 
Sub and Solve
V = 1024
r = 8
p=3.14
V = pi*r^2 * h
1024 = 3.14*8^2 * h    combine the right side.
1024 = 3.14*64 *h       
1024 = 200.96 * h       divide by 200.96
1024/200.96 = h
You are only getting 5 inches. 
None of your answers work.The conversion to meters is going to give you an even smaller number. If you add a comment, I'll come back and edit this question.
 
        
        
        
Answer:
1245
Step-by-step explanation:
 
        
                    
             
        
        
        
Factor the numerator and denominator and cancel the common factors.
The answer is 3x.