Answer:
3.29ft/mi
Explanation:
The gradient of a river is the slope through which a river flows. It measures the vertical drop in elevation of river to the horizontal distance.
Mathematically;
River gradient = [tex]\frac{Elevation}{horizontal distance}[/tex]
Elevation = 1229ft
Horizontal distance = 373miles
River gradient = [tex]\frac{1229}{373}[/tex] = 3.29ft/mi
