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change in elevation: Distance

So if the highest is 300m and the lowest is 100m then the change will be 200m. Pretend the distance between the two places is 1km but you have to make the units the same and kilometer does not equal meters so you have to convert km to m. Since 1000m=1km then 1km is 1000m and that will be the distance so 200m:1000m is 1:5

remember that there is no units for gradient. So the the answer is 1:5 or 0.2 or 20%

Hope that helped!

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Q: How do you calculate gradient on a topographic map?
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