Question

If a plus sight of 12.03 ft is taken on BM A, elevation 312.547 ft, and a minus sight of 5.43 ft is read on point X, calculate the HI and the elevation of point X.

Answer 1

Therefore, height of instrument is 324.577 ft

Therefore, elevation of point x is 330 m

Step-by-step explanation:

Given that

Plus sight on BM = 12.03 ft

Minus sight is = 5.43 ft

Elevation = 312.547 ft

Height of instrument is H.I

H.I = elevation on bench mark + plus sight

= 312.547 + 12.03 = 324.577 ft

Therefore, height of instrument is 324.577 ft

Elevation at point x is = H.I - minus sight

= 324.577 - (- 5.43)

= 330.00 m

Therefore, elevation of point x is 330 m