please solve the 4th question

​Q4. A solid of density 5000 kg m–3 weighs 0.5 kgf in air. It is completely immersed in water of density 1000 kg m–3. Calculate the apparent weight of the solid in water .                         (Ans. 0-4 kgf)

Dear student,
Density of the body=5000kg/m3Weignt in air=0.5gNW=Vdg(where V is the volume)0.5g=V×5000×gV=10-4m3Density of water=1000kg/m3Buoynant force=Vdg=10-4×103×g=0.1kgfapparent weight=0.5-0.1=0.4kgf

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