1.

A cylindrical  block  floats verticallyin a liquid of density (rho1 )kept in a container such that the fraction of volume of the cylinder inside the liquid is x1 . Then some amount of another immiscible liquid of density( rho2)((rho1>rho2) is added to the  liquid in the container so that the cylinder now floats just fully immersed in the liquid with x2  fraction of volume of the cylinder  inside the liquid of density rho1. The ratio rho1/ rho2.A) 1-x2/ x1-x2B) 1-x1/x1+x2C) x1-x2/x1 + x2

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Considering
Rho=p, M= mass of the cylinder, V= volume of the cylinder. g= acceleration due to gravity.

1st condition of floatation

Mg = Vx1p1g

2nd condition of floatation

Mg =Vx2p1g+V(1-x2)p2g

Comparing these two equations we get

x1p1=x2p1+(1-x2)p2

p1/p2=(1-x2)/(x1-x2)

Option ( A ) is accepted



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