*The perimeter of a rectangle is 40 cm. The length of the rectangle is less than double its breadth by 1 cm. Find the length and breadth.*
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Answer:
Given that
P = 40, l = 12
As we know that
Perimeter of Rectangle (P) = 2 * (length + breadth)
ie. P = 2*(l+b)
=> 40 = 2 * (12 + b)
=> 40 / 2 = [2*(12 + b)]/2 (Divide both side by 2)
=> 20 = 12 + b
=> 20 - 12 = 12 - 12 + b (Subtract 12 from both side)
=> 8 = b
=> b = 8
Ans: Breadth is 8cm
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