Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 18 (Q.No. 29)

UPSC Civil Service Exam Questions

29.

In an external focussing tacheometer, the fixed interval between the stadia hairs is 5 mm; the focal length of the objective is 25 cm ; and the distance of the vertical axis of the instrument from the optical centre of the objective is 15 cm. The constants of the tacheometer are

50 ; 0.40 m

50 ; 0.25 m

100 ; 0.40 m

30 ; 0.10 m