A rectangular building is to be congtructed with a curtain wall that will be parallel to the front, and will divide the space ines a sales area of 1500 m 2, and a itorage area of 500 m 2. The outwide wall on both sides and across the back will be constructed of coscrete block at a cost of $100 per linear meter. The front wall, which will be comprised primarly of glans, will cost $345 per linear meter, while the curtained wall will cert $45 per linear meter, Find the dimension of the building that will give the required floge areas at the lowett coat for all of the walls.