Density of metallic block, ρ=5gcmcm−3 Volume of block, V=5cm×5cm×5cm Upthrust force on the metallic block in water. F1=m⋅g =ρwV×g [ρw=1gcm−3] =Vg=5×5×5×g =5×5×5gf ∴ Apparent weight = Weight of block - Upthrust force =mg−5×5×5gf =(m−5×5×5)gf =(ρV−5×5×5)gf =(5×5×5×5−5×5×5)gf =5×5×5(5−1)gf =5×5×5×4gf