A rain gutter is to be constructed from a metal sheet of width 30 cm by bending up one-third of the sheet on each side through an angle θ.
How should θ be chosen so that the gutter will carry the maximum amount of water?
A rain gutter is to be constructed from a metal sheet of width 30 cm by bending up one-third of the sheet on each side through an angle θ.
How should θ be chosen so that the gutter will carry the maximum amount of water?