3
6
9
12
Correct answer is A
Total surface area of cube = 6s2
6s2 = x
s2 = x = x6.....(1)
volume of a cube = s2 = x2
s2 = x2......(2)
put(1) into (2)
s(x6) = x2
s = x2×6x
= 3cm
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