Question

Find the side length of a square with the given area:
area = 400 square kilometres​

Answer 1

Answer:

$\sqrt{400}$

$20$

Answer 2

Answer:

Area of square =

$400 \: {km}^{2}$

${side}^{2} = 400$

$side = \: \sqrt{400}$

side = 20 km

length of side of a square = 20 km