You`re making my head hurt. Let`s see. You`re making an 11 x 11 square. Hypotheneuse of the triangle equal to the sum of the sides... multiplied by... A train going 60 miles an hour leaves from New York City.
I`ll have to get back to you on this.
I see no easy way but to make some models using MS Word. Show gridlines for length and start placing rectangles that are representative of all your varoius sizes. Seems to me this represents a huge challenge for cutting the fabric. There would be no clean cuts or seams?? Labor intensive??
If the rectangles are the same size then the number of rectangles is simply (45*L)/(l*w) where L is fabric length (inches), l is rectangle length (inches) and w is rectangle width (inches).
We need to know the most efficient way to calculate how many rectangles of 1 color we can fit into a piece of fabric 45" wide by 36" inches long, where the 36" length can vary.
What are the different lengths of the 36’’ pieces