Question

Which of the following is the ratio of packing density of $fcc,bcc$ and cubic structures ?

• A. $0.92:0.70:1$
• B. $0.70:0.92:1$
• C. $1:0.92:0.70$
• D. $1:0.70:0.92$

Answer 1

Answer: (C)

Packing fraction in $fcc,bcc$ and $sc$ are $0.74,0.68$, and $0.52$ respectively.
Ratio $=\frac{0.74}{0.74}:\frac{0.68}{0.74}:\frac{0.52}{0.74}$
$=1:0.92:0.70$