Problem 2: The cross-section notes shown below are for ground excavation for a 10-m wide roadway. Sta 16+100 8.20L 13.65R +2.15 +3.50 +5.80 What is the cross-sectional area at Sta 16+100. A. 64.1125 m² B. 46.1125 m² C. 58.1125 m²

2. Determine the enclosed area of Lot 5, shown in the figure below. Also, compute the length of the curving boundary line BC. The data for the curved boundary line BC are given: the central angle A = 41.4° and the curve radius R = 200 ft. D N S45°E 100.00 ft A S45°W 100.00 ft Lot 5 Arc N45°E 200.00 ft Chord 141.42 ft R= 200.00 ft B A = 41.4°

Show the illustration/diagram. Show complete and detailed solution. From station 0 + 040 whose center height is 1.2 m. fill, the ground line has a uniform sclope of 6.5% going to station 0 + 100 with a center height of 3.5m. Solve for the grade of the finished roadway.