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Water from a storm drain flows over an outfall onto a porous bed which absorbs the water at a uniform vertical velocity of 8 mm/s, as shown in Fig. P3.19. The system is 5 m deep into the paper. Find the length L of bed which will completely absorb the storm water. <image 1> (A) 50 m (B) 70 m (C) 90 m Answer with the option's letter from the given choices directly. No punctuation. | (C) Expected Answer: A Difficulty: Medium Subfield: Fluid Mechanics |