How do the spacings of the three planes (100), (110) and (111) of cubic lattice vary?

How do the spacings of the three planes (100), (110) and (111) of cubi

1.	How do the spacings of the three planes (100), (110) and (111) of cubic lattice vary?
Answer» SOLUTION :`1 : 1// SQRT2 : 1 // SQRT3`