Postby lamlon » Mon Apr 02, 2012 12:16 pm
A metal channel is formed by turning up the sides of width x of a rectangular sheet of metal through an angle theta. If the sheet is 200mm wide, determine the values of x and theta for which the cross-section of the channel will be a maximum. The answer from the book give x = 200/3 and theta = pi/3 but I have no idea how to go about solving this, any help would be appreciated thanks.