It think that it would be D) or C).
Plz tell me if it is right or wrong it the comments below.
Well let's see, how about we subtract 6 P.M from 30 minutes and that is 5:30 P.M then we subtract 5:30 by 15 minutes, and we get 5:15 P.M then we subtract 5:15 P.m by 45 minutes and we get 4:30 P.M
For this case we have that by definition, the density is given by:

Where:
M: It is the mass
V: It is the volume
We find the volume of the cylinder:

Where:
r: It is the radius of the cylinder
h: It is the height

So the density is:

Answer:
