A soda can made of 0.1 mm thick aluminum sheet (density = 2.7*10^3 kg/m3) has a cylindrical shape 5 cm in diameter (the sheet was bent to make the cylindrical surface) and 12 cm high. The closed and empty can is dropped into a fluid with a density of 950 kg/m3.

a) What is the volume fraction inside of the can (considering it approximately the same as the outside) which must be filled with a liquid of density 1.05*10^3 kg/m3 so that the can does not accelerate in the initial starting situation in the middle of the fluid solution: 88%.