Question

Find circumference of each plate?

Answer 1

$ar \: sqr \: = 784 \: {cm}^{2} \\ {s}^{2} = 784 \\ s = \sqrt{784} \\ s = 28$
$radius \: = 28 \div 4 \: \\ radius = 7$
circumference of circle =
$circumference \:of \: circle = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 7 \\ = 44cm$
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Answer 2

Hi Mate !!!

We know that area of square having length L

L²= 784cm²

L = 28 cm or L = - 28 cm

But L can not be negative because Length can

not be negative

L / 2 is the diameter of two plate.

So radius of one plate is L / 4

= 7 cm

So circumference of each plate

2 π r

= 2 π 7

14 π cm

44 cm