Answer: A - 30 cubes
B - Volume of prism =  feet³
Step-by-step explanation: We are given that the dimensions of the rectangualr prism is,
Length = Â = Â feet
Width = 1 foot
Height = Â = Â feet
Thus, the volume of the prism = Length × Width × Height
i.e. Volume of the prism =  × 1 ×  =  feet³
Now, the side of the cube = Â foot each.
Volume of the cube =  =  feet³