A "square" of shingles is 10 ft x 10 ft totaling 100 sq ft. So, the amount you will need would be 60ft x 30ft = 1800 sq ft/100 sq ft = 18 sq Good luck.
Average price in Southeast is $3 - $4 per sq ft for stone tile like travertine
If a 412 pitch means a one third pitch then 20% needs to be added on to the area to be covered. So, for a 40ft x 60ft building, the total area to be covered is 40x60 = 2400 sq ft. Adding 20% or 480 sq ft this comes to 2880 sq ft. Next work out the area of the plywood sheets. Lets say 10ft x 5ft or 50 sq ft. So the total number of sheets is total area needed divided by the area of the sheets. That works out to 2880/50 = 57.6 or 58 sheets. A useful table for working out the area of a roof for various pitches is at the web link below.
The area is 12889 sq metres, approx.
When talking about the area of a roof, remember that it is not the same as the square footage of the structure. For example a 20 x 30' building with a 12" overhang and a 4/12 pitch will have 736 sq ft of roof vs only 600 sq ft of slab. One square of shingles covers 100 square feet. 15 year shingles come 3 bundles to a square. 25 year come 4 bundles to a square.
480 sq mm = 0.00516668 sq ft
393
1 mm = 0.003281 ft approx.
2
3,500 mm = 37,673.7 ftft
1 sq ft = 92903 sq mm
= 0.649305555555556 sq ft or =13/20 ft = 93.5 sq in ≈ 603.2 sq cm ≈ 60,320 sq mm
8 ft * 4 ft * 6 mm = 64 sq ft * 8 mm = 5.95 sq metres * 0.008 m = 0.048 m3.
3000 sq-ft multiplied by $10=$30,000 (you would multiply your square-footage by your cost per sq-ft)
You cant because you gave only one number. To calculate square feet you need length and breath.However However
It is not entirely clear what the question is asking but the areas can be configured as80000 sq ft = 400 * 200 sq ft leaving an area of 400 * 200 sq ft, then 40000 sq ft = 400 * 100 sq ft leaving an area of 400 * 100 sq ft, then 10000 sq ft = 100 * 100 sq ft leaving an area of 300 * 100 sq ft, then 5000 sq ft = 100 * 50 sq ft leaving an area of 250 * 100 sq ft.
1 foot = 12 inches = 304.8 mm. So 1 square foot = 304.8 x 304.8 = 92,903 sq mm. 6 sq ft = 557,418 sq mm