The packing efficiency of the two-dimens...

The packing efficiency of the two-dimensional square unit cell shown below is :

A

`39.27%`

B

`68.02%`

C

`74.05%`

D

`78.54%`

Verified by Experts

The correct Answer is:

D

`a=(2sqrt(2)r)`
`P.F.=(2xx T T r^(2))/((2sqrt(2)r)^(2))=(2T T r^(2))/(8r^(2))= (T T)/(4)`

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