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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 0, as shown in the figure. How should 0 be
chosen (in radians) so that the gutter will carry the maximum amount of water?
- 10 cm → 10 cm → 10 cm
0 = 0.5235
X radians
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