Answer: the length of the flag is 770ft.
The width of the flag is 350 ft
Step-by-step explanation:
Let L represent the length of the national flag.
Let W represent the width of the national flag.
The formula for determining the perimeter of a rectangle is expressed as
Perimeter = 2(L + W)
The perimeter of the flag is 2,240ft. This means that 2240 = 2(L + W)
Dividing through by 2, it becomes
1120 = L + W- - - - - - - - - - - -1
if the length is 420 ft greater than the width, it means that
L = W + 420
Substituting L = W + 420 into equation 1, it becomes
1120 = W + 420 + W
2W + 420 = 1120
2W = 1120 - 420 = 700
W = 700 / 2 = 350
L = W + 420 = 350 + 420
L = 770
