Respuesta :

Answer:

length=18units, width=6 units

Step-by-step explanation:

let width=x

then length= 3x

perimeter=2l+2b

48=2(3x)+2x

x=6

width=x=6units

length=3x=3(6)=18units
  • Width be x
  • Length is 3x

Now

  • 2(L+B)=Perimeter
  • 2(x+3x)=48
  • 2(4x)=48
  • 4x=24
  • x=6

Length=3(6)=18