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The packing efficiency of the two dimensional square unit cell shown below is:
image
A. `39.27%`
B. `68.02 %`
C. `74.05%`
D. `78.54%`

1 Answer

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Correct Answer - D
Packing efficiency
`=("Area covered by particle")/("Total area")`
`=(2pir^(2))/((2sqrt(2)r)^(2))=pi/4`
`=(3.142)/4xx100=78.55%`

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