Question

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

Answer 1

Length =x
width=x-8
Perimeter of a rectangle=2(length) + 2(width)

We can suggest this equation:
2x+2(x-8)=52
2x+2x-16=52
4x=52+16
4x=68
x=68/4
x=17

length=x=17
width=x-8=17-8=9

Answer: the width of this rectangle is :   9 cm