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Which is /are correct statements about f...

Which is /are correct statements about face centered cubic unit cell of edge length `2a`?
Given : `0.414^(3)=0.071, 0.225^(3)=0,2^(3//2)=2.83`

A

The number of next to next neighbours are 24 at a distance of `sqrt(6)a`

B

The packing fraction of cubic unit cell is 0.74

C

The edge fraction unoccupied by the particle is 0.293

D

The volume fraction occupied by the particle is 0.731 if all octahedral voids occupied by the particles with idea radius particles in unit cell.

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