Question

What is the effect on surface area of a cube if its edge is increase to thrice of original?

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Answer 1

Answer: new area is 9 times the original area

Step-by-step explanation:

original side of the cube= a units

Total surface area of the cube= 6a² unit²

new side of the cube= 3a units

new total surface area = 6(3a)²

                                     = 6×9a²

                                     = 54a²

                                     =9(6a²)

                                     =9(old area)

New area = 9×old area