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.

Question

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.

Quizplus · Accepted Answer

According to the graph, the notch is filled to the top when the river reaches a flow rate of approximately 60 cubic meters per second. From the graph, it can be seen that this flow rate is exceeded approximately 30% of the time. Therefore, the probability that the notch will be filled to the top is around 60-80%.

The Lowest Notch Shown on This Figure Is 9 Meters