Respuesta :

lucic

Answer:

48cm

Step-by-step explanation:

take width of rectangle to be=xcm

Length will be 3x

Area of rectangle=length × width

A=3x × x =3x²

3x²=108

x²=108/3=36

x²=36

x=√36=6cm

substitute

lenth=3x=3×6=18

width=x=6cm

perimeter=2l+2w

p=2×18 + 2×6

p=36+12=48cm

The only numbers that the criteria fit is 6 and 18

length=18 cm

width=6 cm

6*3=18, so it fits

6+6+18+18=48

Perimeter=48 cm