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If the sides of two cubes are in the ratio 3: 1 the ratio of their total surface area is?

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If the sides of two cubes are in the ratio 3: 1 the ratio of their total surface area is?

A. 3:1
B. 8:1
C. 9:1
D. 12:1
a1 : a2 = 3 : 1
6 a12 : 6 a22 = 9: 1