A plus sight of 373 ft is taken on BM A elevation 83789 ft a

A plus sight of 3.73 ft is taken on BM A, elevation 837.89 ft, and a minus sight of 7.99 ft is read on point X Part A Calculate the HIl. Express your answer to 5 significant figures and include appropriate units. ValueUnits Submit Request Answer Part B Calculate the elevation of point X Express your answer to 5 significant figures and include appropriate units. Value Units Submit

Solution

Elevation of BM = 837.89 ft

Back Sight on BM (BS) = 3.73 ft

So Height of Instrument (HI) = Ele(BM)+BS= 837.89+3.73 = 841.62 ft

Minus Sight or Fore Sight(FS) on X = 7.99 ft,

So elevatio of X = HI - FS = 841.62-7.99 = 833.63 ft