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 =
Elevation = 1229ft
Horizontal distance = 373miles
River gradient =
= 3.29ft/mi
Reason a is the correct one, as the european union has nothing to do with protection from invasions and Germany reunified many years ago.
three.
It is formed by the confluence of three other rivers, the White Nile (Bahr-el-Abiad), Blue Nile (Bahr-el-Azrak) and River Atbara. The Blue Nile (Bahr-el-Azrak) flows from Lake Tana (Ethiopia), converging with the White Nile in Khartoum, capital of Sudan