The figure above shows a metal hex nut with two regular hexagonal faces and a thickness of 1 cm. The
length of each side of a hexagonal face is
2 cm. A hole with a diameter of 2 cm is drilled through the
nut. The density of the metal is 7.9 grams
per cubic cm. What is the mass of this nut to the nearest
gram?
(Density is mass divided by volume.)