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Question Three A staff was held vertically at a distance of 100 m and 300 m from the center of the theodolite fitted with stadia hairs and the staff intercepts with the telescope horizontal were 0.990 and 3.000 respectively. The instrument was then set over a station A of R.L 950.50 m and the height of instrument was 1.42 m. The stadia hair readings of a staff held vertically at station B were 1.00, 1.83 and 2.67 m while the vertical angle was - 10 00. Find the distance AB and R.L of B