It depends what characteristic you wish to measure.
Length: Metre
Area: Square metres
Mass: Kilogram
plus a host of other units for other characteristics.
Which unit would you use to measure the water in a full tub?
to measure a small trashcan
Gallons
metres
of course u will use centimeters by laqueena
The same unit as you use to measure any mass. The SI unit for mass is the kilogram.
it is use to measure output
The Unit Used To Measure A Train Can Be Kilometer.
what you are trying to measure
Miles
This depends on what unit you are using to measure in. However, area will always be measure in (unit)^2.
Tons
Which unit would you use to measure the water in a full tub?
Feet
to measure a small trashcan
mg
Kilograms