Road - permille

5 km long road begins at an altitude 500 meters above sea level and ends at a altitude 521 ASL. How many permille road rises?

Correct result:

p =  4.2


y=521500=21 m x=5 km m=5 1000  m=5000 m  p=1000 yx=1000 215000=215=215 ‰=4.2 ‰

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