You measure it and add up the figures,- this is where learning math comes in handy, kids.
I assume the 2100 sq ft is the ground cover. It will require each wall to be measured and added together to get the overall interia messurements to get sq ft - is height multiplied by width of wall Therefore - a wall 15 feet high and 20 feet long will be 15x20 = 300sq ft
8-ft x 6-ft = 48 square feet
8-ft x 12-ft = 96 square feet
50 ft x 90 ft = 4500 square feet. One square yard (3 ft x 3 ft) = 9 square feet. Therefore, 4500 square feet = 500 square yards.
(7 ft) * 32 ft = 224 sq ft
Area of wall: 17 times 17 = 289 square feet
9.2 ft
80 ft
width x length divided by 144 will give you square ft.
Measure the length by the width in feet. Multiply the one by the other and the answer will be square feet.
length times width so if you have a room that is 10 ft by 10 ft then your room is 100 square feet 10 x10 =100
If the wall is sloped uniformly then the length of the wall is irrelevant and the average height is (4+1)/2 = 2.5 feet. If the wall is not uniformly sloped you have no chance of answering the question!