Answer:
see explanation
Explanation:
The face of a cube is a square with area = s² ← s is the side length
The cube has 6 square faces , hence
surface area = 6 × ( )²
= 6 × = = = 13.5 units²
I think the answer is 13.5 square units.
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)² 
= 
= 
= 13.5 units²