The perimeter of a square is 40 cm, find its area?
Let side of square = $$s$$ cm
Perimeter of square = $$4 \times s = 40$$
=> $$s = \frac{40}{4} = 10$$ cm
$$\therefore$$ Area of square = $$(s)^2$$
= $$(10)^2 = 100 cm^2$$
=> Ans - (A)
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