A staff was held vertically at a distance of 100m and 300m from the centre of a theodolite fitted with stadia hairs and

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A Staff Was Held Vertically At A Distance Of 100m And 300m From The Centre Of A Theodolite Fitted With Stadia Hairs And 1 (64.19 KiB) Viewed 53 times

A staff was held vertically at a distance of 100m and 300m from the centre of a 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 RL 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 angles was 10° 00'. Find the distance AB and RL of B.