Question

I will mark u as the brainiest if u get this correct thx x

Answer 1

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

Answer 2

Answer:

length= 14cm and width= 7cm

Step-by-step explanation:

• The ratio of the length to width is 2:1 so $\frac{length (l)}{width(b)} =\frac{2}{1}$
• The perimeter is the sum of 2 length sides and 2 width sides so $perimeter=length+length+width+width=2length+2width$
• Now from the ratio we know $\frac{length (l)}{width(b)} =2$ so $length=2width$
• So put that into the perimeter equation
• $perimeter=2(2width)+2width$ so the perimeter is 42cm

• $42cm=2(2width)+2width\\42cm=4width+2width\\42cm=6width\\width=7cm$  
• Since length is twice the width, length is 14 cm