15 square inches means 240 square feet
1in = 4 ft
the living room, if square shaped, has sides = sqr15 = about 3.873 inches in the model, which means 4(3.873) feet = about 15.5 feet. square it gives the area = [4(3.873)]^2 = 240 ft^2
if the living room model is 3 by 5 inches, then the real living room is 12 ft by 20 ft = 240 ft^2
if the living room model is circular shaped, then it's radius = sqr(15/pi) inches and the real living room radius = 4sqr(15/pi) feet
it's area = pi[4sqr(15/pi)]^2 = pi(16(15)/pi^2 = 16(15) = 240 square feet
No matter what shape the living room is, its size = 240 ft^2 if the model area is 15 in^2
