I need help finding the value of this figurehead

Answer:
See below, please
Step-by-step explanation:
Volume
[tex] = (x + 12) \times (x + 3) \times 2x[/tex]
[tex] = ( {x}^{2} + 15x + 36) \times 2x[/tex]
[tex] = 2 {x}^{3} + 30 {x}^{2} + 72x[/tex]