earth science question on mass, density and volume?

Michelle

New member
its kinda long!
The mass of object b is 173g. a third object is made of the same uniform matieral as obj b but has twice the volume of obj b. how does the density of this third obj compare to the density of obj b?
It was number 2, but i really dont understand why, if someone could explain that would be gr8 :)
 
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