Find √? /15= 4 ?  Choose the correct choice from the following options:  A) 76  B) 5776  C) 304  D) 3600  E) none

Rationale: "answer let √ n / 15 = 4 then √ n = 15 x 4 = 60 ∴ n = 60 x 60 = 3600 . correct option : d"
Answer: D