Q.

A solid sphere of volume v and density ρ floats at the interface of two immiscible liquids of densities ρ1and ρ2 respectively. If  ρ1<ρ<ρ2,then the ratio of volume.of the parts of the sphere in upper and lower liquid is:

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a

ρ-ρ1ρ2-ρ

b

ρ+ρ2ρ+ρ1

c

ρ+ρ1ρ+ρ2

d

ρ2-ρρ-ρ1

answer is B.

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Detailed Solution

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(V1+V2)ρg=V1ρ1g+V2ρ2g
 V1(ρ-ρ1)=V2(ρ2-ρ)            V1V2=ρ2-ρρ-ρ1

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A solid sphere of volume v and density ρ floats at the interface of two immiscible liquids of densities ρ1and ρ2 respectively. If  ρ1<ρ<ρ2,then the ratio of volume.of the parts of the sphere in upper and lower liquid is: