I understand how to calculate the elevation at a point between two contour lines when the dimensions and contour elevations are given using Rise / Run = Distance A / Total Distance
So using an example from Designer Hacks:
X / 8′ = 10’ / 18′
X = 8 x 10 / 18
X = 4.44′ = Elev. 824.44'
But how do you calculate the dimension or max distance between two contour lines if the elevations and a slope percentage are given? Is the formula Rise / Run = Slope? So Rise / X = Slope and solve for X ?
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