Civil Engineering - UPSC Civil Service Exam Questions - Discussion


The "Back sight" reading on a vertically held staff at a point A on the floor along the centre line of a railway tunnel is 3.465 m, and the "Fore sight" on the inverted staff held at the roof of the tunnel just vertically above A is 1.115 m. The height of the tunnel along the centre line at floor point A is

[A]. 2.310 m
[B]. 3.465 m
[C]. 4.620 m
[D]. 6.930 m

Answer: Option C


No answer description available for this question.

Nira said: (Jul 13, 2015)  
Ans: 3.465+1.115 = 4.58.

Shaharukh said: (May 19, 2018)  
3.465 + 1.115 = 4.580.

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