Respuesta :

Answer:

length= 18units, width=6units

Step-by-step explanation:

let the width of rectangle= x

then, length= 3x

perimeter= 2l+2B

           48=2(3x)+2(x)

           48= 6x+2x

             x= [tex]\frac{48}{8}[/tex]

             x= 6

width=x=6units

length=3x=3(6)= 18units