Pretty small. If it is a square room, it would be less than 7 feet by 7 feet.
40 x 40 = 1600 sq ft
That room size can be estimated 15 ft x 40 ft
250 sq ft room is about the size of a typical master bedroom
16ft x 12½ft for example
The size of 30ft.x10ft. room.
Width: 1200/40 = 30 feet
If the room were square, each side would be about 19.1 ft.
40'x15' = 600 sq ft = 600/9 sq yards = 66.66... sq yards.
920 sq. ft.
40 x 30 = 1200 sq ft
20 x20 * * * * * And why not 10 ft x 40 ft? And why do you assume it is square or rectangular?
the Soleus CFM-40 40 dehumidify 200 sq ft.