Volume of the rectangular pyramid:
[tex]v = \frac{lwh}{3} [/tex]
[tex]v = \frac{9 \times 8 \times 9}{3} [/tex]
[tex]v = 216 \: {cm}^{3} [/tex]
Volume of the rectangular prism:
[tex]v = lwh[/tex]
[tex]v = 8 \times 7 \times 9[/tex]
[tex]v = 504 \: {cm}^{3} [/tex]
Total volume:
[tex]v = 216 + 504[/tex]
[tex]v = 720 \: {cm}^{3} [/tex]
