[(?)² + (18)²] ÷ 125 = 3.56

A. 11

B. 12

C. 14

D. 15

E. None of these

Answer: Option A

Solution(By Examveda Team)

Let, $$\frac{{{x^2} + {{\left( {18} \right)}^2}}}{{125}} = 3.56$$
Then,
$$\eqalign{ & {x^2} + 324 = 125 \times 3.56 = 445 \cr & \Rightarrow {x^2} = 121 \cr & \Rightarrow x = 11 \cr} $$