Answer:
Step-by-step explanation:
Formula Development
Let the width = w
Let the Length = 5*w
P = 72
P =2w + 2L
Area = 5w * w
Solution
Start with the Perimeter. Solve for w.
P = 2w + 2L Substitute the givens
72 = 2w + 2*5w Combine
72 = 2w + 10w Combine Combine again
72 = 12 w Divide by 12
72/12 = 12w/12
w = 6
Now for the area
Area = 5w * w
w = 6
Area = 5*6*6
Answer: Area = 180 cm^2
