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When a body hanging from a spring balance is immersed in water it floats just above the surface of water and shows 100 g loss in its weight, (i)what is the

weight of the body in water, (ii) what is the weight of the body in air ? (iii) what is the volume of the body


The question states that the body floats,so,
Weight of the body must be equal to the buoyant force acting on the body
⇒Weight of the body in water =100g
Weight =mg or actual weight of the object in air
so mg -100=100
∴Its weight in air=200g 
We know that buoyant force =vdg
⇒Volume of the body is 10g/cc or 10g/cm^3
Hope this helps,sorry if i'm wrong,i don't guarantee this result so ask this to your teacher she will probably be able to solve it.

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