Your friend of mass 80 kg can just barely float in freshwater.Calculate her approximate volume.

Answer 1

For floating the buoyancy force F has to be equal to m•g

F = M•g = D•V•g, where D is the density of water.
Then m•g = D•V•g
V=m/D=80/1000 = 0.08 m^3

Answer 2

mkm