A Cylindrical Can Is to Have a Volume of 45 $\pi$

Short Answer

A cylindrical can is to have a volume of 45 $\pi$ cubic inches. The cost of the material used for the top and bottom of the can is 4 cents per square inch, and the cost of the material used for the curved side is 5 cents per square inch. Express the cost of constructing the can as a function of its radius.