Perimeter of a rectangle is:
P=2l+2w
w=l-8
52=2l+2(l-8)
52=2l+2l-16
52=4l-16
4l=68
l=17
therefore
w=l-8,
w=17-8
w=9
The width of a rectangle is 8 cm less than its length. The perimeter of the rectangle is 52 cm.
What is the width of the rectangle?
7 cm
9 cm
15 cm
17 cm
1 answer