Question

The length of diagonal of a square whose area is 16900 $m^2$ is ___ .

• A. 30 m
• B. $130\sqrt{2}m$
  
• C. 169 m
  
• D. 144 m

Answer 1

The correct option is B $130\sqrt{2}m$



Let the side of square be x m, then $x^2=16900m^2$ or $x=\sqrt{16900}$ or x =130 m
Diagonal $BD=\sqrt{D{C}^2+B{C}^2}$
$=\sqrt{{130}^2+{130}^2}=130\sqrt{2}m$