The percentages of void space for simple cubic bcc and hcp arrangemwnt

1.	The percentages of void space for simple cubic bcc and hcp arrangemwnt respectively are
Answer» SIMPLE cubic : % of VOID space - 48 % body centered cubic : % of void space - 32 % hexagonal cubic % of void space - ?

The percentages of void space for simple cubic bcc and hcp arrangemwnt respectively are

Answer»

SIMPLE cubic :

% of VOID space - 48 %

body centered cubic :

% of void space - 32 %

hexagonal cubic

% of void space - ?