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How can we find lenght using perimeter and breadth?

Answer»

Let’s CONSIDER an example:
If length of a rectangle is 10 cm and its perimeter is 22 cm, then find its BREADTH.
Given length, l = 10 cm and perimeter = 22 cm
We know that perimeter of rectangle = 2 (l + b) units
22 = 2(10 + b)
⇒ 10 + b = 11
⇒ b = 1 cm
Hence breadth of the rectangle is 1 cm.
In general, perimeter of rectangle P = 2(l + b)
(P/2) = l + b
⇒ b = (P/2) – l
Using above formula ALSO you can directly find the value of breadth......


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