Задача id10684

A steel tank in the shape of a truncated cone has no bottom and is installed on a horizontal plane (Fig.). To what height x must the liquid rise so that the tank breaks away from the horizontal plane under the action of liquid pressure on the side surface, if D = 2 m; d = 1 m; H = 4 m; s = 3 mm; pst = 7.8•103 kg/m3; рв = 103 kg/m3; g = 10 m/s2?

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