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A cubical block of copper of side 10cm i...

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 cm

B

2.5cm

C

5cm

D

7.5cm

Text Solution

Verified by Experts

The correct Answer is:
C
Let `h` = height to of water column
then `rho_(w)gh + rho_(Hg)g(10-h)=rho_(Cu)g 10`
`implies h+13.6(10-h) = 73`
`implies 63=12.6h implies h=5cm`.
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