Question

The length of Marshall's rectangular poster is 2 times its width. If the perimeter is 24 inches, what is the area of the poster?

Answer 1

Length=2x
width=x
Perimeter of a rectangle=2(length) + 2(width)
We can suggest this equation:
24=2(2x)+2x
24=4x+2x
24=6x
x=24/6
x=4

length=2x=2(4)=8
width=x=4

area of a rectangle=length x width
area of this poster (rectangle)=(8 in)( 4 in)=32 in².

The area of this poster will be: 32 in²