Question

Assume you are an engineer assigned to design a solid cylindrical counterweight that must put 40 N of tension on a line. You have a choice of using Material A that has a density of 2000 kg/m3 and a cost of $6.00 per cm3, or Material B that has a density of 5000 kg/m3 and cost of $19.00 per cm3. You are directed to choose the material that will weigh 40 N but cost the least. Which material do you choose? What is the volume of your final design?

Answer 1

you should choose material A and its volume is 2040 cm³