ANSWER
B. 11.2 ft
EXPLANATION
We have that the area of the square room is 125 square feet.
The area of a square is given as:
[tex]A=L^2[/tex]
This means that to find the length of side of the square room, we have to find the square root of the area.
That is:
[tex]\begin{gathered} L\text{ = }\sqrt[]{A} \\ L\text{ = }\sqrt[]{125} \\ L\text{ }\cong11.2\text{ ft} \end{gathered}[/tex]
That is the length of the side of the room.
