If you mean "how many 3x5-inch cards cover 300 sq. ft": 1 card = 3*5 =15 sq. in. = 15/144 sq. ft. (12x12 = 144 in^2 = 1 ft^2) N cards *15/144 = 300 N = (300*144)/15 = 2880
8 ft * 5 ft = 8*5 sq ft = 40 sq ft
13 ft * 5 ft = 65 sq ft = 6.039 sq metres.
About 1500 sq ft
5 sq ft = 0.465 sq metres.
If you mean "how many 3x5-inch cards cover 300 sq. ft": 1 card = 3*5 =15 sq. in. = 15/144 sq. ft. (12x12 = 144 in^2 = 1 ft^2) N cards *15/144 = 300 N = (300*144)/15 = 2880
12 ft * 20 ft = 240 sq ft 5 ft * 5 ft = 25 sq ft So 12 ft * 20 ft minus 5 ft * 5 ft = 240 sq ft - 25 sq ft = 215 sq ft
8 ft * 5 ft = 8*5 sq ft = 40 sq ft
13 ft * 5 ft = 65 sq ft = 6.039 sq metres.
9 sq ft = 1 sq yd so 45 sq ft = 45/9 = 5 sq yds
volume_cuboid = length × width × height = 4 ft × 2.3 ft × 5 ft = 46 cu ft surface_area_cuboid = 2 × (length × width + width × height + height × length) = 2 × (4 ft × 2.3 ft + 2.3 ft × 5 ft + 5 ft × 4 ft) = 2 × (9.2 sq ft + 11.5 sq ft + 20 sq ft) = 2 × 40.7 sq ft = 81.4 sq ft
If 5 litres of cement is used in every sq ft. Then 5 x 1400 sq ft is 7000
About 1500 sq ft
it takes 5 sq ft
Top = 5 x 3 = 15 sq ft Bottom = 5 x 3 = 15 sq ft 2 sides = 5 x 7 = 35 sq ft each other 2 sides = 3 x 7 = 21 sq ft each Total cardboard = 142 square feet Surface area = 142 sq ft inside, and 142 sq ft outside.
5 ft * 37 ft = 185 sq ft = 17.187 sq metres
5 sq ft = 0.465 sq metres.