Quiz 1 ( 2nd sec ) : Density and relative density

If you have two pieces of iron the ratio between there volumes is 1 : 3 then the ratio between there densities Is

Two liquids were put in a container of mass 10 Kg on putting the first liquid the mass of the container become 40 kg and on putting the second liquid ( water ) the mass of container become 50 Kg then the relative density of liquid is

A container completely filled with water of density 1000 kg/m3 and total mass of 250 gram if An iron sphere of mass 350 gram was dropped inside that container if there was a 50 gram of water was spoiled Find the density of iron :

An sphere made of iron of density ( 8000 kg/m3 ) its outer radius is 1 m if it was evacuated from inside and the internal hollow part radius is 20 cm then the average density of the whole ball is

A room filled with air of density 1 .2 kg / m3 and room dimensions is 3 m ( height ) 5 m ( width ) and ( 10 m ) length then the mass of the air within the room is