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# Find the length of the side of a square whose area is 441 m square.

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

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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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