For this case we know that the area of the rug is 48 ft^2 and we also know that the width is 6' we try to find the perimeter so we can do this.
We can start converting the 6' into ft and we got:

Now we can use the formula of area in order to solve for the lenght like this:

And solving for L we got:

And the perimeter for this case would be given by:

And replacing we got:
