Arrange the following description in the form of a profile level notes complete to elevation. a level is set up and a reading of 2.995 m is taken on a benchmark, the elevation of which is 12.135 m. at the beginning of the line to be profiled, the rod reading is 2.625 m., 30m from the beginning, it is 1.617m. at 60m, it is 0.702m, at 66m and 81m, the rod readings are 1.281 m and 0.762 m respectively. on a rock that is not on the line, the rod reading is 0.555 m. the level is then removed ahead, set up and a rod reading of 1.952 m is observed on the rod that is still being held on the rock. the readings along the profile are then resumed, 90m from the beginning of the line, the rod reading is 1.159 m, 120m from the beginning of the line rod reading is 1.434 m, finally 150m from the beginning of the line, the rod reading is 2.196 m.
compute the elevation at the point 60m from the beginning of the line