Discussion Forum : Levelling
Question - When instrument is at P the staff readings on P is 2.748 and on Q is 1.824 when instrument at Q the staff readings on P is 1.606 and Q is 0.928. Distance between P and Q is 1010 mts. R.L. of P is 126.386. Find error due to collimation?
Options:
A .  0.178 mts
B .  0.192 mts
C .  0.194 mts
D .  0.188 mts
Answer: Option B
Answer: (b).0.192 mts

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