A symmetrical parabolic summit curve connects two grades of 6% and -4%. It is to pass through point P on the curve at station XXXXXXXXXXhaving an elevation of 98.14 meters. If the elevation of the...

A symmetrical parabolic summit curve connects two

grades of 6% and -4%. It is to pass through point P on

the curve at station 25+140 having an elevation of 98.14

meters. If the elevation of the grade intersection is 100

meters with a stationing of 25+160;

With illustrations.
a) Compute the length of the curve

b) Compute the elevation of the highest point of the

curve

c) Compute the elevation of station 25+120 on the

curve