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If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor down stream of the crestwall, is given by the equation


Options:
A .  `t = (h + 1)/(G + t)`
B .  `t = (h - 1)/(G + t)`
C .  `t = (h - 1)/(G - t)`
D .  `t = (h + 1)/(G )`
Answer: Option C



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