You can measure it. You can calculate it from other data; the details vary on the specific situation. For example, for a rectangle:area = width x length
If you happen to know two of the numbers, you can calculate the third one with this formula.
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To get width, you measure it.
If you want to find a particular width, we need more details.
The formula "length x width x height" is a general formula to find VOLUME?
The formula for the volume of a rectangle is length x width x height. The area i just length x width
the formula of area is l*w or length (times) or ''x'' width
Volume
To find the relationship in width and area you can use the formula area/length = width. To find the area of a room you multiple the length by the width.