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UPSC Civil Service Exam Questions

Q1: 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

ANS:C - 4.620 m

3.465 - (-1.155) = 4.620m.



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