Answer:
P = 2 (2w+w)
Step-by-step explanation:
We know that the regular formula for finding the perimeter of a rectangle is P = 2 (l+w) and if we are asked to find what we can do if we know that the length is twice as long as the width all we would have to do is replace the l with 2w with w representing the width. The 2 is what shows that it is twice as long as the length which was originally represented by l. P of course represents the perimeter. I hope this has been of help to you! If you have any further questions please do not hesitate to ask :) Have a great rest of your day!