rama_v
Active Member
Hey everyone, Can I please get help with this question:
An open box is to be made of thin sheet metal with a square base having edges x metres long and vertical sides y metres long. It is to have a volume of 2 m3
(i) Show that the surface area of the box (asuming negligible thickness) is given by A = (8/x) + x2
k I got that part..the next part though I can't.
(ii) Prove that the cost of insulating the inside of the box will be a minimum if x =2y
An open box is to be made of thin sheet metal with a square base having edges x metres long and vertical sides y metres long. It is to have a volume of 2 m3
(i) Show that the surface area of the box (asuming negligible thickness) is given by A = (8/x) + x2
k I got that part..the next part though I can't.
(ii) Prove that the cost of insulating the inside of the box will be a minimum if x =2y
