50. b and b are two points on the topographic map shown below. the distance between b and b along thelinear traverse bb' is 220m. the angle of the slope along t

50. B and B are two points on the topographic map shown below. The distance between B and B along thelinear traverse BB' is 220m. The angle of the slope along this traverse is degree (give answer in two decimal places). 0- 100 Contour Interval = 20m