The CE marking (also known as CE mark) is a mandatory conformity mark on many products placed on the single market in the European Economic Area (EEA). The CE marking certifies that a product has met EU consumer safety, health or environmental requirements.
A rod is a unit of length, equal to 11 cubits, 5.0292 metres or 16.5 feet. A rod is the same length as a perch and a pole. Download Distance and Length Unit Converter. our powerful software utility that helps you make easy conversion between more than 2,100 various units of measure in more than 70 categories.
In the end you take a pole 8ft long, and see that the pole is maybe 1ft or 2ft shorter then the height. You conclude that height of the room is perhaps h=9ft or maybe h=10ft. The measurement of height is least precise measurement. Its error is 1/10 = 10%. To find volume you must multiply V=abh. V = 1900 cubic feet But because error of h is 10%, the error in volume is also 10%, maybe 1800cubic feet, maybe 2000 cubic feet.