Physics Question on mechanical properties of fluid

Question

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

Answer 1

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
$m=80\, g$