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Area of a Square

The perimeter...

Question

The perimeter of a square is $40 c m$ . A rectangle of length $20 c m$ has the same area as that of the square. Find the breadth of the rectangle.

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Solution

Area of square $= s i d e^{2} = 1600 c m^{2}$
Area of rectangle $=$ length $\times$ breadth $= 1600$
$\Rightarrow$ breadth $= \frac{1600}{20} = 80$ cm.

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