in what unit volume are measured
The standard SI unit for length is the meter. Using the meter and multiplying the measure of length by width by height gives units of #m^3#. In practice, a common unit for both solid and liquid volume in the lab is the cc or cubic centi-meter. For liquid volume the most common units are the cc, the milli-liter (which is the same as a cc) and the liter (1000 cc's).