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  4. A body when fully immersed in a liquid of specific gravity 1.2 weighs 44 gwt. The same body when fully immersed in water weighs 50 gwt. The mass of the body is

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Q. A body when fully immersed in a liquid of specific gravity $1.2\, $ weighs $44\,gwt$. The same body when fully immersed in water weighs $50\, gwt$. The mass of the body is

WBJEEWBJEE 2012Mechanical Properties of Fluids

Solution:

Balancing equation
$W=m g-V \rho g$
Hence,
$44=m-1.2\, V$ ...(i)
$50=m-V$ ...(ii)
On solving Eqs. (i) and (ii) we get
$m=80\, g$