Question

[check my work ]
A cylindrical container, with a volume of 4000cm³ is being constructed to build candies. The cost of the base and lid is $0.005/cm², and the cost of the side walls is $0.0025/cm². Determine the dimensions of the cheapest possible container.

Okay so I finished the problem and got the right radius but i'm having problems finding the height !

Answer 1

whys ur handwriting so neat..

Answer 2

its hard to read that scan tho

Answer 3

lets just go over the steps

Answer 4

tell me what you wrote for your surface area equation
and volume equation