Respuesta :

let x be the length and width of rectangle
since it says length twice,

length 2x
width x

perimeter -> 2x+2x+x+x = 6x
6x = 42
x = 7

length, 2x = 7x2 = 14
width, x = 7

Answer:

Length = 14 and width = 7 cm,

Step-by-step explanation:

Let the width be x cm then the length is 2x cm

2x + 2(2x) = 42

6x = 42

x = 7

Length = 14 and width = 7.