A solid weighs 32 gf in air and 28.8 gf in water. Find (i) the volume of solid, (ii) R.D. of solid, and (iii) the weight of solid in a liquid of density 0.9 g cm^-3.

A body weighs 20 gf in air and 18 gf in water. Calculate relative density of the material of the body.

A jeweller claims that he makes ornament of pure gold of relative density 19.3. He sells a bangle weighing 25.25 gf to a person. The clever customer weighs the bangle when immersed in water and finds that it weighs 23.075 gf in water. With the help of suitable calculations find out whether the ornament is made of pure gold or not.

[Hint — Calculate R.D of material of bangle which comes out to be 11.6]

A piece of iron weighs 44.5 gf in air. If the density of iron is 8.9 x 10³ kg m^-3, find the weight of the iron piece when immersed in water.