Question

Find the perimeter of a square part whose area is 361 square km

Answer 1

Given that

Area of square Part = 361 km²

now as we know that area of square = side² then

361 = side²

=> side = $\sqrt{361}$

=> side = 19

now perimeter

= 4 × side

= 4 × 19

= 76 km

hope it helps

Answer 2

let each side of be X m.

then, area of a square =side x side

=> 361 = X x X

$= > 361 = x {}^{2} \\ \\ = > \sqrt{361} = x$

=> 19 = x

hence, the length of each side of a square is 19

perimeter of a square = 4 x side

= 4 x 19

= 76km

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