Question

whats the perimeter of a square whose are is 100cm2

Answer 1

area=length^2

100=l^2

l=10cm

so perimeter =4l=4×10=40cm

Answer 2

HEY MATE,
Here is your Answer
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Given - Area of square = $\{edge}^{2}$ = $\{100cm}^{2}$

Side of square = $\sqrt{100}$ = 10 cm

Perimeter of square = 4(edge) = 4(10) = 40cm.
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Hope this helps!!!!!