Perimeter is the sum of all sides. For a rectangle, P = 120 = 2L + 2W.
You are given that
L = 3n
W = n,
so you can now do a substitution into the perimeter equation:
120 = 2(3n) + 2(n).
Simplifying this, we get 120 = 8n, so n = 15.
Revisiting our length and width equations,
L = 3(15) = 45
W = 15
Area is length * width, which is A) 675 units.
(BTW, love the username.)
The perimeter of the rectangle is 120 units what is its area in square units
L=3n
W= n
What formula do I use?
A) 675
B) 900
C) 1225
D) 2700
1 answer