Question

The area of  a square is 400 cm2.The length  of each side  is
  (a) 100 cm  (b) 20 cm   (c) 200 cm  (d) 20m



answer it as fast as you can I will mark you as brainest
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Answer 1

b answer is 400cm

Step-by-step explanation:

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Answer 2

Answer:

(b)20

Step-by-step explanation:

$20 \times 20 = 400$