If a river originates 200 meters above sea level and travels 400 kilometers to the ocean, what is the average gradient in meters per kilometer? 0.2 m/km 2 m/km 5 m/km 0.5 m/km
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Ответ:
Just use 200 meters divided by 400 kilometers
200m/400km = 1m/2km = 0.5m/km
Hope this helps.
Ответ: