Find the simplest formula of a solid containing `A` and `B` atoms ia cubic arrangement In which `A` occuples corner and `B` the centre of the faces of unit cell. If the side length is `5 Å`, estimate the density of the solid assuming atomic weights of `A` and `B` as `60` and `90`, respectively.

Options

A. `XY , 3.35 g // cm ^(3) `
B. `XY_(3) , 4.38 g// cm ^(3)`
C. `XY_(3) , 3.48 g//cm^(3)`
D. `XY_(2) , 2.48 g// cm ^(3)`

Answer

B