To find the length of the other side of the rectangular room, we can use the formula for the area of a rectangle:
Area = length x width
We know that the area of the room is 168 square feet and that one side (length) is 15 feet. So we can plug these values into the formula and solve for the other side (width):
168 = 15 x width
To solve for width, we can divide both sides of the equation by 15:
width = 168/15
Simplifying the right side of the equation gives:
width = 11.2
So the other side of the rectangular room is 11.2 feet long.