an architect designs a rectangular window such that the width of the window is 40 com less than the height. If the perimeter of the window is 500 cm, what are the widths and heights?

3 answers

2(w + w+40) = 500
2 h + 2 w = 400

h + w = 200

w + 40 + w = 200

2 w = 160

w = 80

h = 120
I used 400, use 500