The picture shows a rectangular window with a length of 120cm. The perimeter of the window is 400cm. What is the width of the window
Let the width of the window be x cm.
As we know, the perimeter of a rectangle is given by the formula:
Perimeter = 2(length + width)
Given that the length is 120 cm and the perimeter is 400 cm, we can plug in the values into the formula:
400 = 2(120 + x)
400 = 240 + 2x
160 = 2x
x = 80
Therefore, the width of the window is 80 cm.