Respuesta :

kirokokomo

Answer:first fine the perimeter 42cm then do the lenth then width and u get the answer

Step-by-step explanation:

or find it on google

SageRage

Answer:

length= 14cm and width= 7cm

Step-by-step explanation:

  • The ratio of the length to width is 2:1 so [tex]\frac{length (l)}{width(b)} =\frac{2}{1}[/tex]
  • The perimeter is the sum of 2 length sides and 2 width sides so [tex]perimeter=length+length+width+width=2length+2width[/tex]
  • Now from the ratio we know [tex]\frac{length (l)}{width(b)} =2[/tex] so [tex]length=2width[/tex]
  • So put that into the perimeter equation
  • [tex]perimeter=2(2width)+2width[/tex] so the perimeter is 42cm
  • [tex]42cm=2(2width)+2width\\42cm=4width+2width\\42cm=6width\\width=7cm[/tex]  
  • Since length is twice the width, length is 14 cm
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