Answer: 12 feet.
Explanation:
The formula used to calculated the area of a rectangle is:

Where "l" is the lenght and "w" is the width.
You need to find the lenght of the bedroom, then you must solve for the lenght "l":

You know that the floor of Paul's and Matthew's rectangular bedroom has an area of 132 square feet and its width is 11 feet. Then, you can substitute these values into
to calculated the lenght. Therefore, the result is:

