One of the faces of a cube has an area of 2. What is its surface area?
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Answer: 12
Step-by-step explanation:
Surface area of a cube = 6a²
Given that one of the faces of a cube has area 2
Since each side of the cube is a , the area of each face of the cube is a² .
So it is given that a² = 2
So surface area of a cube = 6a² = 6x2 = 12
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