Question

the area of a square is 81m.Find the perimeter of the square.​

Answer 1

the perimeter of square is 36

Answer 2

Answer:

Perimeter of square is $36$ m  .

Step-by-step explanation:

To find : perimeter of square

Given : area of square is $81$ m .

Solution :

• As per given data we know that , area of square is $81$ m .
• We know that all four sides of square are equal .
• If ' $a$ ' is the side of square then area of square is given by,
• Area of square = $a^{2}$
• Therefore, by substituting the value in above formula we find side of square .

        $81 = a^{2} \\\\\sqrt{a^{2} } = \sqrt{81} \\\\ a = 9$

• As we know that , side of square is $9$ m now we can find perimeter of square .

• Perimeter of square $= 4a$

                                          $= 4\times 9\\\\= 36\ m$