Question: Notice that one of your answers will be a number density and the other will be a mass density.
a. A rectangular box has dimensions L = 2cm, W = 5cm, and H = 10cm. How many of these boxes will fit into a cube of volume 1m3?
b. If each box has a mass m = 0.01 kg, what is the density (mass per unit volume) of the assembly of boxes?