Answer:
A width: 3 unit cubes
height 3 unit cubes
Step-by-step explanation:
Volume of rectangular prism = 81 unit cubes
[tex]l[/tex] = Length of rectangular prism = 9 unit cubes
[tex]w[/tex] = Width of rectangular prism
[tex]h[/tex] = Height of rectangular prism
Volume of a rectangular prism is given by
[tex]V=lwh\\\Rightarrow 81=9wh\\\Rightarrow wh=\dfrac{81}{9}\\\Rightarrow wh=9[/tex]
The product of width and height must be 9 so from the options this is only possible when width and height both are 3 units.
So, the width is 3 unit cubes and the height is 3 unit cubes.
