Final answer:
The volume of the prism is calculated by multiplying the cross-sectional area (27 cm²) with the length (3 cm), resulting in a volume of 81 cm³.
Step-by-step explanation:
To find the volume of a prism, you need to multiply the cross-sectional area by the length. In this case, the cross-sectional area is 27 cm² and the length is 3 cm. So, the volume of the prism is:
Volume = Cross-sectional Area x Length
Volume = 27 cm² x 3 cm = 81 cm³