A cubical block of copper of side `10cm` is floating in a vessel containing mercury. Water is poured into the vessel so that the copper block just gets submerged. The height of water column is (`rho_(Hg) = 13.6 g//c c , rho_(Cu) = 7.3 g//c c , rho_(water) = 1gm//c c)`A. 1.25 cmB. 2.5 cmC. 5 cmD. 7.5 cm

A cubical block of copper of side `10cm` is floating in a vessel conta

1.	A cubical block of copper of side `10cm` is floating in a vessel containing mercury. Water is poured into the vessel so that the copper block just gets submerged. The height of water column is (`rho_(Hg) = 13.6 g//c c , rho_(Cu) = 7.3 g//c c , rho_(water) = 1gm//c c)`A. 1.25 cmB. 2.5 cmC. 5 cmD. 7.5 cm
Answer» Correct Answer - C Let h =height to of water column then `rho_(w) gh+rho_(Hg)g(10-h)=rho_(Cu)g^(10)` `rArr h+13.6(10-h)=73` `rArr 63=12.6 h rArr h=5 cm `

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