A piece of metal, when weighed in air, has a weight of 20.7 N. When completely submerged in blood (ĉ = 1060 kg/m3), the metal has a weight of 12.7 N. Based on the values from table 11.1 in the text, what is the most likely metal?

Question

Here is the answer but I need help with the steps of equations to use.

Aluminum (closest density to the calculated 2740 kg/m3 of the metal)

Answer 1

weightinblood=20.7-volumeblood*1060

solve for volume blood

density=20.7/volumeblood