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A rectangular plane surface 2 m wide and 3 m deep lies in water in such a way that its plane makes an angle

A rectangular plane surface 2 m wide and 3 m deep lies in water in such a way that its plane makes an angle of 30 with the free surface of water. Determine the total pressure and position of center of pressure when the upper edge is 1.5 m below the free water surface.

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