Answer:
length = 42 feet , width = 21 feet .
Explanation:
Given : The length of rectangle is twice its width. The perimeter of the rectangle is 126 feet.
To find : Find the width , length.
Solution : We have given
Length = 2 * Width .
Perimeter = 126 feet .
Let length = l
Width = w .
Perimeter = 2 ( length + width )
Plug the values
126 = 2 ( 2 w + w )
126 = 2 ( 3w).
126 = 6w .
On dividing both sides by the number 6
w = 21 feet .
Width = 21 feet .
Length = 2 * 21= 42 feet .
Therefore, length = 42 feet , width = 21 feet .