First take a piece of thread having length of 10 yards.
Weight it. then devide it at 10. now you have the weight of one yard.
now multiply it to your desired length.
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Cone thread is thread typically used on an overlock "serger" machine. It is thread wound on a cardboard or plastic cone, and is much bigger than a standard thread spool.
The curved surface area of a cone is: pi*radius*slant length.
You cannot.
The height of?æ a cone is found by use of Pythagoras theorem. Pythagoras theorem states that the sum of the squares of two shorter sides (in this case, the shorter sides are?æ the height and radius of the cone) are equal to?æ the square of the longer side (for this case the longer side is the length of the cone).
The shape described cannot be a cone since a cone has a base at one end and a point - of zero length - at the other!