The lowest notch shown on this figure is 9 meters wide and 5 meters high from its base. The river has a velocity of 1 meter per second when it fills the notch. Based on the accompanying graph, what is the probability each year that the notch will be filled to the top?





A) 90% to 95%

B) 60% to 80%

C) 40% to 45%

D) Less than 40%

E) None of these are correct.


B) 60% to 80%

Environmental & Atmospheric Sciences

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