Answer:
9 meters
Explanation:
The perimeter of a rectangle is calculated by adding all its sides, so in this case, it can be expressed as:
Perimeter = 2(length + width)
Substituting the given values:
72 = 2(3w + w)
Now, we can simplify the equation:
72 = 2(4w)
72 = 8w
w = 72/8
w = 9
Therefore, the width of the room is 9 meters.