To determine how many window coverings are necessary to span 50 units, you need to know the width of each individual window covering. If, for example, each covering is 10 units wide, you would need 5 coverings to cover the entire span (50 ÷ 10 = 5). Adjust the calculation based on the actual width of the window coverings you plan to use.
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If each window covering covers 15 windows, and there are a total of 50 windows to be covered, it will take 4 window coverings. There will be an excess amount that can either be cut off and hemmed or each covering can be gathered to give a fullness to the coverings.
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