Find √? /20 = 4 ? Select the correct option
A) 76
B) 6400
C) 304
D) 1296
E) none

Rationale: "answer let √ n / 20 = 4 then √ n = 20 x 4 = 80 ∴ n = 80 x 80 = 6400 . correct option : b"
Answer: B