Distance(cm) Elevation(cm) 0 13 2.5 12.8 5 13.2 7.5 11.5 10 11 12.5 11.2 15 11.2 17.5 11.5 20 12 22.5 11.5 25 12.7 27.5 13.5 30 12.5 32.5 13.3 35 12.8 37.5 12.4 40 12 42.5 12.2 45 12 47.5 12 50 12.3 52.5 11.7 55 11.6 57.5 11.5 60 11.8 62.5 10.8 65 11.5 67.5 12.1 70 12.3 72.5 13.2 75 12.6 77.5 12.3 80 11.8 82.5 11.4 85 11.5 87.5 12 90 11.7 92.5 11.6 95 11.5 97.5 12.2 100 12