If you travelled downstream along the main outflow from Lake Victoria, which forms part of the borders of Uganda, Kenya and Tanzania, which city would you be closest to when you reached the mouth of the river?
The ans is - Cairo
If you travelled downstream from the Victoria Falls on the border of Zambia and Zimbabwe, which country would you be in when you reached the ocean?
If you travelled down the Missouri River from Bismarck, North Dakota, which city would you be in when you reached the ocean?