how are aluminum arrow shafts made?
What is 'r'? What is the shape of the tin? Is it cylindrical or cuboidal?
Missing information - I believe you also need to tell us the volume of the tinOtherwise the total area can be minimized by letting r be 0 (or as cloase to 0 as possible)
ALUMINUMArrow shafts made from aluminum have been the standard for years, and remain so today, for several reasonsAluminum arrows are remarkably consistent in size and weight, thanks to precise manufacturing processesThe shafts are formed by pulling aluminum tubes across a mandrel until they meet exact specifications for diameter, wall thickness and weightThe shafts are then straightened by machine to tolerances as fine as .00 15 inch.
