Two parallel tangents 18 m. apart are to be connected by a reversed curve. If the radius of the branch beginning at the P.C. is to be 820 meters and the total length of the chord from the P.C. to the P.T. is to be about 250 meters, what is the required radius of the branch ending at the P.T.

The following table shows the stations and ordinates for a mass diagram. The free-haul distance is 600 ft. Overhaul cost is $12 per station yard. (a) Use the method of moments to compute the additional cost that must be paid to the contractor. (b) Sketch the ground profile if the finished grade of this roadway section is level (0 percent).