# Question #b1a9b

$D = \frac{3000 g}{80 , 000 c {m}^{3}} = .0375 \frac{g}{c {m}^{3}}$
You know density, is given by the ratio of Mass to Volume of the object, $D = \frac{M}{V}$ where M = mass and V= Volume
Thus calculate $V = w \times l \times h = 16 \times 100 \times 50 = 80 , 000 c {m}^{3}$
and $D = \frac{3000 g}{80 , 000 c {m}^{3}} = .0375 \frac{g}{c {m}^{3}}$