The available space occupied by spheres of equal size in three dimensions in both hep and ccp arrangements is

Question

The available space occupied by spheres of equal size in three dimensions in both hcp and ccp arrangements is

(a) 74%

(b) 70%

(c) 60.4%

(d) 52.4%

Answer 1

Correct option is (a) 74%

The available space occupied by spheres of equal size in three dimensions in both hcp and ccp arrangements is 74%.