Question $20$

A crest vertical curve joining $a+2\%$ and $a-3\%$ grade is to be designed for $70mph.$ If the tangents intersect at station $(340+40\mathrm{.}00)$ at an eleva $BVC($be $230ft,$ determine the station and elevath of the curve is $1,235ft($P$)$ curve$).$ Minimum leng possible and type out any $($Please show all work as best as posly articulate$)$ that you would like to clearly aricu

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