If the ratio of the areas of two squares is 225:256, then the ratio of their perimeters is : Choose the correct choice from the following choices:
A) 15 : 12  B) 15 : 14  C) 15 : 16  D) 15 : 22  E) none of these

Rationale: explanation : a 2 / b 2 = 225 / 256 = 15 / 16 < = > 4 a / 4 b = 4 ∗ 15 / 4 ∗ 16 = 15 / 16 = 15 : 16 option c
Answer: C