the mass of a bottle is filled with water is found to be 150gm.the mass of the empty bottle is 50gm and the external volume of the container is 125cm cube.find the density of the material of the bottle.

Given,
Mass of bottle filled with water=150 g
​Mass of empty bottle=50 g
External volume of the container=125 ${\mathrm{cm}}^3$
Density of material of the bottle=?
Density of material of the bottle=Mass of empty bottle/ Volume
=50/125=0.4 g/${\mathrm{cm}}^3$