Calculate the horizontal distance of a point from the instrument, if the staff intercept is 2.5 m. The micrometer reading of the drum of the diaphragm is 3.2 and the micrometer screw has 100 threads in 1 cm. The focal length of the objective glass is 200 mm and the distance of the instrument axis from the centre of the object glass is 180 mm.

Calculate the horizontal distance of a point from the instrument, if t

1.	Calculate the horizontal distance of a point from the instrument, if the staff intercept is 2.5 m. The micrometer reading of the drum of the diaphragm is 3.2 and the micrometer screw has 100 threads in 1 cm. The focal length of the objective glass is 200 mm and the distance of the instrument axis from the centre of the object glass is 180 mm.
A.	972
B.	1367.4
C.	1562.8
D.	1721.6
Answer» D. 1721.6