Answer:
0.0020 kilograms per cubic cm
Step-by-step explanation:
[tex]density \: of \: brick \\ = \frac{mass}{volume \: of \: brick} \\ = \frac{2.3}{20 \times 10 \times 5.7} \\ = \frac{2.3}{1140} \\ = 0.00201754386 \\ = 0.0020 \: kg \: per \: cubic \: cm[/tex]
