Answer:
W = 6 feet
L = 15 feet
Step-by-step explanation:
The perimeter of the rectangle is the length of the outer boundary.
If length is defined as L and width is defined as D,
Perimeter = 2(L + W)
Perimeter is given to be 42 feet.
2(L + W) = 42
(L + W) = 21 ------------------(1)
Also , Its length, L, is three feet more than twice its width, W.
L = 2W + 3 -------------------(2)
Solve (1) and (2) ,
3W + 3 = 21
W = 6 feet
L = 15 feet
