The area of the ceiling is 375 square feet. The area of the floor is also 375 square feet. If we knew how low the floor is below the ceiling, we could also tell you the area of the walls.

the formula is L (length) X W (width) = square feet /9 = square yards so in this case 15' X 25' = 375 square feet /9 = 41.67 sq yds ummmmmm...... I thought it was 125, (15 times 25= 375, 375 divided by 3=125

Making the totally unjustified assumption that the pavers are 9 inch by 5 inch (where does it say that?), the area covered by 375 pavers will be 375*9*5 sq inches =375*9*5/(12*12) sq ft = 117.1875 sq ft

Pretty near 375 meters long. It can also be expressed in other units with which you may be more comfortable: 0.375 kilometers 1,230.32 feet (rounded) 410.1 yards (rounded) 0.233 miles (rounded) 1.864 furlongs (rounded)