Question

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

Answer 1

Area of square = 400 km²

a² = 400 km²

a = 20 km

Answer 2

Answer:

20 km

Step-by-step explanation:

Area of a square = side X side

or,

$side = \sqrt{area} = \sqrt{400} km$

Therefore,

side = 20 km

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