UPSC Civil Service Exam Questions - Civil Engineering Questions and Answers

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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

2.310 m

3.465 m

4.620 m

6.930 m

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