Find the area of a square whose perimeter is 40 cm.

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Solution

Perimeter of a square $4 \times$ sides $= 40$ cm (given)
Side of a square $= \frac{40}{4} = 10$ cm
Area of a square $=$ side $\times$ side $= a^{2} = 10^{2} = 100$ sq.cm

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Find the area of a square whose perimeter is 40 cm.

Perimeter of a square4×sides=40cm (given)Side of a square=404=10cmArea of a square=side×side=a2=102=100sq.cm

Perimeter of a square $4 \times$ sides $= 40$ cm (given)
Side of a square $= \frac{40}{4} = 10$ cm
Area of a square $=$ side $\times$ side $= a^{2} = 10^{2} = 100$ sq.cm