(GEOLOGY) A hydrogeologist comes to your property and determines that the aquifer permeability is 45 meters per day and the porosity is 40%. Using the equations below, these values, and hydraulic gradient you calculated above, determine how long, in years, until the contaminated water intersects your well. Assume the contaminant travels at the same velocity as the groundwater.

I am also provided with these values and equations: THANK YOU!
hydraulic gradient= 0.025m
h1 and h2 are 2000m apart
h2 is 150 m above water level and h2 is 200 m above water level.

Average velocity of groundwater= (permeability x hydraulic gradient) / porosity
Time= distance/velocity

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)