Question

The length of a rectangle is four times its width.
If the perimeter of the rectangle is 80 cm, find its length and width.

Answer 1

Answer:

• length 32 cm
• width 8 cm

Step-by-step explanation:

Let w represent the width. Then the length is 4w and the perimeter is ...

  P = 2(length +width)

  80 = 2(4w +w) = 10w . . . . substitute given values

  8 = w . . . . . . . divide by 10

  length = 4w = 4·8 = 32

The length is 32 cm; the width is 8 cm.