if the length and the breadth of a rectangle are doubled, then its perimeter
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Let the length be (l) cm
Let the breadth be (b) cm
Perimeter = 2l + 2b
= 2(l+b) cm
New length and breadth = 2l and 2b
Perimeter = 4l+4b
= 4(l+b)
Therefore, the perimeter also becomes double
Hope this helps you :)
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