Find the length of the curve 
Definitions:
Iso-profit Line
A graphical representation in economics showing all possible combinations of two inputs that yield the same profit level.
Producing
The act of creating, manufacturing, or generating goods or services.
Feasible Solution
A solution to a problem that meets all the constraints and requirements, often used in the context of optimization problems.
Quantity
A term denoting the amount or number of units of a particular item or material.
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