# The slope of the river is 10 cm / km, or 0.0001. Determine the difference in altitude between points A and B, if the first one

November 11, 2020 | Education

| **The slope of the river is 10 cm / km, or 0.0001. Determine the difference in altitude between points A and B, if the first one is 100 km upstream of the second.**

1) To find the difference in heights, let’s determine the fall of the river in this section.

The slope of a river is the ratio of its fall (in cm) to its length (in km).

Y (river slope) = P (river fall): L (river length), hence

P = Y × L = 10 cm / km × 100 km = 1000 cm = 10 m

Answer: the difference in height between points A and B is 10 m.

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