Width = 9cm
Length = 18cm
<u>Explanation:</u>
Let width = b,
So, length = 2b
Perimeter of rectangle = 2x(length + width)
According to the question,

Hence,
Width = 9cm
Length = 18cm
9 loljdjdbdbbdhdhdsivsvsg7sg7s7f
the answer is C i belive sorry if i got it wrong i have dislexia idk if i spelt it right