Q.6  Find the length of the side of a square whose area is 441\; m^{2}.

Answers (1)

Let the length of the side of a square be x m.

Area of square = x^2

So equation becomes :      x^2 = 441

By prime factorisation of 441.

441 = 3\times3\times7\times7

Thus x = 21.

So the length of the side of square = 21 m.

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