VERTICAL CURVES - Solving for SUMMIT, and ELEVATION and GRADE of CURVE! (SURVEYING)

PROBLEM BRIEF:
A 3% grade at Sta. 10+100m is to be connected to a -2% grade at Sta. 10+420m using a symmetrical parabolic curve, If the tangent grades intersect at elevation 152m, evaluate the:
Location and elevation of the summit
Elevation and grade of the curve at Sta. 10+200
The elevation of end of vertical curve or PT

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