Find the Dimensions of a Rectangle of Area $400 \mathrm { ft } ^ { 2 }$

Multiple Choice

Find the dimensions of a rectangle of area $400 \mathrm { ft } ^ { 2 }$ that has the smallest possible perimeter.

A) $4 \mathrm { ft }$ by $100 \mathrm { ft }$
B) $1 \mathrm { ft }$ by $400 \mathrm { ft }$
C) $2 \mathrm { ft }$ by $200 \mathrm { ft }$
D) $20 \mathrm { ft }$ by $20 \mathrm { ft }$