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A line of levels is run from point A (elevation 512.53 ft) to point B to determine its elevation. The value so obtained is 521.96 ft. If a check of the rod after the work is done reveals that the bottom 0.04 ft have been worn away, what is the correct elevation of point B if there were 18 instrument setups?
a. 522.00
b. 521.92
c. 521.96 ft
d. None of the above

Respuesta :

Answer:

d ) None of the above

Step-by-step explanation:

  • The measured distance between point A and B = 521.96 ft - 512.53 ft = 9.43ft

  • If bottom 0.04ft have been worn away, this implies there will be a decrease in the measurement scale, as such ;
  • Actual measurement = 9.43ft - 0.04 x 18(18 different instrument setups) = 8.71ft
  • hence, new level = 512.53 ft + 8.71ft = 521.24ft

Hence the answer is None of the above

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