Answer:
Length of the prism is 9 cm.
Explanation:
We are given,
A rectangular prism with volume 72 cm², width 2 cm and height.
As, we know,
Volume of a rectangular prism = Length × Width × Height
i.e. 72 = Length × 2 × 4
i.e. 72 = Length × 8
i.e. Length =

i.e. Length = 9 cm.
Hence, the length of the prism is 9 cm.