Units and Nomenclature
I have used units likely to be most familiar to the majority of my readers. Although I welcome the increasing use of SI units, many people still use imperial units—they are more familiar with a 1-in. pipe than a 25-mm pipe.
Short lengths are therefore quoted in inches but longer lengths in meters and feet:
Volumes are quoted in cubic meters (m3) and also in U.S. gallons:
A tank 30 ft tall by 40 ft diameter has a volume of 1,068 m3 (280,000 U.S. gallons); a tank 15 ft tall by 20 ft diameter has a volume of 133 m3 (35,250 ...
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