If the sides of a cube are in the ratio 5:4. What is the ratio of their diagonals?
Select the correct option
A) 4 : 3	B) 5 : 4	C) 4 : 7	D) 3 : 4	E) 4 : 5

Rationale: "explanation : diagonal of a cube = a √ 3 where a is side a 1 : a 2 = 5 : 4 d 1 : d 2 = 5 : 4 where √ 3 cancelled both side answer : b"
Answer: B