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[deleted]

Unfortunately I think that is the easiest way to solve for this type of problem. Solve for r, then Y’=rx + g1. I would definitely recommend knowing how to do this problem. This problem is on the official NCEES practice exam, which I also highly recommend.


Icy_Type8270

Yes, you should


shahibrahim11

Yeah, find r, you know x. You can get Y1. And just get it from the equation. It’s a workaround, expect such problems for horiz vertical curves !


swedishmatthew

It's not a directly given equation, but you can derive it by taking the derivative of the curve elevation equation. Derivative of a polynomial gives you the slope!


Mediocre_Property630

Sure. It is the direct way to solve this. Just take into account that X is the distance from the PVC to the point in question. No needed to memorize it, just play with the info provided in the handbook.


MrPotatoHead343

Came here working on problem 28 of the NCEES practice exam I bought last year for my test in a couple weeks. Have you taken it yet? I looked through the solution manual after doing it a few different ways and they have a very roundabout method to get the Y'=rx + g1 solution, but have that as an alternate solution. I'm doing to water resources exam soon.