Finding The Length Of Parabolic Curve Given Change In Grade Per Station Date of Exam May 2018 Subject Mathematics, Surveying and Transportation Engineering Problem A +0.8% grade meets a -0.4% grade at km 12 + 850 with elevation 35 m. The maximum allowable change in grade per station is 0.2%. Determine the length of the curve. A. 300 m C. 80 m B. 240 m D. 120 m Answer Key Click here to show or hide the Answer Key [ D ] Solution Click here to expand or collapse this section $\dfrac{L}{0.8 + 0.4} = \dfrac{20}{0.2}$ $L = 120 ~ \text{m}$ ← answer Category Surveying Route Surveying Parabolic Curve Summit Curve Length of Parabolic Curve Log in or register to post comments