Physics
posted by Rayan
an empty rd bottle weighs 60 grams but weighs 120 gram when completely filled with water when the bottle is completely with an unknown liquid it weighs 90 gram what will be the volume of the rd bottle

Steve
just figure the mass of water, and recall that water has a density of 1g/cm^3
No idea what the unknown liquid has to do with anything. 
Mohini
Mass of empty RD bottle (m1)=60 g Filled with liquid (m2)= 120g
Filled with unkoen liquid (m3)=90g
Mass of water = m2  m1= 120g60g
60g
Density =mass /volume
Volume = mass /density
= 60g *1 g / cm3
= 60cm3
Volume of water = volume of RD bottle
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