Question: 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

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?

- 10 cm -- 10 cm -- 10 cm

- 10 cm -- 10 cm -- 10 cm

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