The packing efficiency of the two dimensional square unit cell shown below is : [JEE-2010] P W F...

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The packing efficiency of the two dimensional square unit cell shown below is :
[JEE-2010]
P
W
Figure
(A) \( 39.27 \% \)
(B) \( 68.02 \% \)
(C) \( 74.05 \% \)
(D) \( 78.54 \% \)
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