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Use of Algebraic Expressions in Formula of Area of Figures

The length of...

Question

The length of rectangle is 10 cm.If the perimeter is 34 cm , find the breadth (cm).

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Solution

The length of the rectangle is 10 cm and perimeter is 34 cm.
We know for a rectangle
perimeter = 2 ( length + breadth )
Hence, $2 (10 + breadth .) = 34 \Rightarrow breadth = 17 - 10 = 7 c m .$

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