The answer depends on what form the output takes.
it is use to measure output
The 'ERG' is the standard unit for work or mechanical energy.
You can use a DC ammeter.
real output per unit of input.
Productivity is a measure of output from a production process, per unit of input.efficiency is used to refer to a number of related concepts.
The same unit as you use to measure any mass. The SI unit for mass is the kilogram.
You would use the unit of measure called "kilograms" to measure the mass of an elephant.
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.
Which unit would you use to measure the water in a full tub?