Given,
side of cube=10 cm
Volume of cube=10×10×10=1000 cm³
Now,
length of side of cube above water=3 cm
length of side of cube immersed in water=10-3=7 cm
Volume of water displaced by the submerged part=10×10×7=700 cm³
mass of the water displaced=density of water × volume of water displaced=1×700=700 cm³
As the cube is floating,
weight of cube=weight of water displaced=700 gf
(i)
(ii)