A) \[20\sqrt{2}\]
B) \[40\,\,\left( \sqrt{2}-1 \right)\]
C) \[40\,\,\left( \sqrt{3}-\sqrt{2} \right)\]
D) \[20\,\,\left( \sqrt{3}-1 \right)\]
E) None of these
Correct Answer: D
Solution :
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