The long chord from PC to PT of a compound curve is 320m long, and the angles it makes with the first and third tangents are 14° and 16°, respectively. If the common tangent is parallel to the long chord, solve the following: a. The radius of the first curve (R1).  b. The radius of the second curve (R2).  c. If station of PC is 8+200, compute the station of PT.

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Q: Construct a parabola by Tangent method using base of length 100 mm and axis of length 50 mm.

A: To construct a parabola.Base length = 100 mm Axis length = 50 mm.

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Instruments for Surveying

Surveying is the practice that determines the relative three-dimensional positions of many different points on the earth’s surface. There are various instruments used in Surveying like Theodolites, Total station, Tripod stands, Plane table, etc. for measuring horizontal angle, vertical and sloping angle, which are very useful for giving accurate and precise measurement.