Let the width of the rectangle be x<div>Therefore, the length of the rectangle is 2x.</div><div>
</div><div>Given, the perimeter is 36 </div><div>
</div><div>Perimeter =2(w+l)</div><div>=2(x+2x)=36</div><div>⇒2(3x)=36</div><div>⇒6x=36</div><div>⇒x=6⇒ Width</div><div>2x=12⇒ Length</div><div>
</div><div>Therefore, the length of the rectangle is 12cm and width is 6cm.</div>