A cylinder floats with its volume 3 cubic metre inside water. What is its total volume if its density 100 kg per cubic metre? Density of water is 1000 kg per cubic metre
Vb = (Dc/Dw)*Vc = (100/1000)*Vc = 3 m^3
0.1Vc = 3
Vc = 30 m^3. = Vol. of cylinder.