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

Based on the graph, the notch is filled when the water level exceeds 5 meters. From the graph, it can be seen that the water level exceeds 5 meters for around 60% to 80% of the time. Hence, the probability that the notch will be filled to the top would also be in the same range, which is 60% to 80%. Therefore, option B is the correct answer.

The Lowest Notch Shown on This Figure Is 9 Meters