A) \[\Rightarrow \]
B) \[r=12cm.\]
C) \[(12\times 8-5\times 3)Sq.m\]
D) \[96-15=81sqm\]
Correct Answer: D
Solution :
Let x be the edge of the new cube \[\sqrt{6}\] \[2\sqrt{3}c{{m}^{2}}\] Now, surface area of new cube \[2\sqrt{2}c{{m}^{2}}\]
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