I think it’s proportional!
Answer:

Step-by-step explanation:
We are give the following in the question:

We have to find the ration of the length of XY to the length XZ.
This, can be done as:

Thus, the ration XY:XZ is 5:14
We know, mass = Density * Volume
mass = 9000 * 0.8 g
mass = 7200 g = 7.2 Kg
So, you final answer is 7.2 Kg
Hope this helps!
the first option is the correct one