A scale drawing is a representation of an object or space that is reduced or enlarged in proportion to the actual object or space. In this case, the scale of the drawing is 1 unit = 1 foot. To find the dimensions of the scale drawing, we need to divide the actual dimensions of the room by the scale of the drawing.
The actual dimensions of the floor are 450 feet by 20 feet.
So, the dimensions of the scale drawing are:
450 feet / 1 unit = 450 units (length)
20 feet / 1 unit = 20 units (width)
Therefore, the dimensions of the scale drawing are 450 units by 20 units. So, the scale drawing is 450 by 20.