Okay, how do I find the mass of an object, when I only have the volume of the object?

Question

For the formula for mass (mass=density x volume), I need the density of the object, and yet, it seems there is no way to find it (it's not given on this homework sheet I have, and in order to find the density, I need the mass, which is what I'm looking for in the first place). ...HELP

Theres no water involved, its just a 3D rectangle with a smaller rectangle on top of it. It has all of it's dimensions on it, it's an isometric drawing and it shows all of its other view seperately. In order to answer the other three questions on this sheet, I need to fully answer the first one, which tells me to find the volume (I've already found this), the area (trying to find using mass = density x volume), and surface area. Once I find what the area of this object is, I can finish the sheet. 2 of the questions on here involve the mass of this object. So, I need to find the density some how. But it really doesn't seem possible gven what I have to work with...

Also, I've already found the surface area. I just need the area, and to find the area, I need the density and the volume. Like I said, I already have the volume, and I need the density. But to find the density, I need the area. =/

Answer 1

You'll need to find the density some how.

Is there anything on the homework sheet that describes the material?

Is it floating in water where you can detemine the volume of water that is displaced?

Answer 2

Find the weight in grams. Density = mass/volume (p =m/v).

Answers may differ if you measure the three dimensions or used a water displacement techique to gain the volume.

Answer 3

The water would not help, since water is displaced by volume, not mass. All this would tell you is whether the material was denser than water or not.

Answer 4

i think you better quote the question so we can understand your problem...